diff --git a/moa/src/main/java/moa/classifiers/deeplearning/CAND.java b/moa/src/main/java/moa/classifiers/deeplearning/CAND.java
index 0316affa2..c7fe9cdc8 100644
--- a/moa/src/main/java/moa/classifiers/deeplearning/CAND.java
+++ b/moa/src/main/java/moa/classifiers/deeplearning/CAND.java
@@ -160,6 +160,12 @@ public class CAND extends AbstractClassifier implements MultiClassClassifier, Ca
             "Stats dump file name",
             "" );
 
+    public IntOption djlRandomSeed = new IntOption(
+            "djlRandomSeed",
+            'S',
+            "Random seed for DJL Engine",
+            10, 0, Integer.MAX_VALUE);
+
     @Override
     public void resetLearningImpl() {
         if (nn != null) {
@@ -428,6 +434,7 @@ class MLPConfigs{
             this.nn[i].numberOfLayers.setValue(numberOfLayersInEachMLP.getValue());
             this.nn[i].deltaForADWIN = nnConfigs[i].deltaForADWIN;
             this.nn[i].backPropLossThreshold.setValue(backPropLossThreshold.getValue());
+            this.nn[i].djlRandomSeed.setValue(djlRandomSeed.getValue());
             this.nn[i].initializeNetwork(instance);
         }
 
diff --git a/moa/src/main/java/moa/classifiers/deeplearning/MLP.java b/moa/src/main/java/moa/classifiers/deeplearning/MLP.java
index d1a54794d..17eee24a1 100644
--- a/moa/src/main/java/moa/classifiers/deeplearning/MLP.java
+++ b/moa/src/main/java/moa/classifiers/deeplearning/MLP.java
@@ -31,6 +31,7 @@
 import com.github.javacliparser.FloatOption;
 import com.github.javacliparser.MultiChoiceOption;
 
+import ai.djl.engine.Engine;
 import ai.djl.Device;
 import ai.djl.Model;
 import ai.djl.basicmodelzoo.basic.Mlp;
@@ -48,9 +49,7 @@
 
 import java.text.DecimalFormat;
 import java.lang.Math;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
+import java.util.*;
 
 import static ai.djl.ndarray.types.DataType.FLOAT32;
 
@@ -220,6 +219,12 @@ public static class NormalizeInfo{
 			new String[]{"GPU (use CPU if not available)", "CPU"},
 			deviceTypeOptionCPU);
 
+	public IntOption djlRandomSeed = new IntOption(
+			"djlRandomSeed",
+			'S',
+			"Random seed for DJL Engine",
+			10, 0, Integer.MAX_VALUE);
+
 
 	public double deltaForADWIN = 1.0E-5;
 
@@ -443,6 +448,12 @@ public void initializeNetwork(Instance inst) {
 			return;
 		}
 
+		Set<String> engines = Engine.getAllEngines();
+		Iterator<String> engineIterator = engines.iterator();
+		while (engineIterator.hasNext()){
+			Engine.getEngine(engineIterator.next()).setRandomSeed(djlRandomSeed.getValue());
+		}
+
 		votes = new double [inst.numClasses()];
 
 		if (useNormalization.isSet() || useOneHotEncode.isSet()) {
diff --git a/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineAdaBoost.java b/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineAdaBoost.java
index 98276ff75..0bde95042 100644
--- a/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineAdaBoost.java
+++ b/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineAdaBoost.java
@@ -227,7 +227,9 @@ protected void adjustEnsembleSize(int nClasses) {
     		for (int i = this.nEstimators; i < nClasses; i++) {
     			this.ensemble.add(this.baseLearner.copy()); 
     			this.nEstimators ++;
-    			this.adwinEnsemble.add(new ADWIN());
+                if (this.driftDetection) {
+                    this.adwinEnsemble.add(new ADWIN());
+                }
     			this.lambdaSc.add(0.0);
                 this.lambdaSw.add(0.0);
                 this.epsilon.add(0.0);               
diff --git a/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineAdaC2.java b/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineAdaC2.java
index 110370401..7048033a1 100644
--- a/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineAdaC2.java
+++ b/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineAdaC2.java
@@ -256,7 +256,9 @@ protected void adjustEnsembleSize(int nClasses) {
     		for (int i = this.nEstimators; i < nClasses; i++) {
     			this.ensemble.add(this.baseLearner.copy()); 
     			this.nEstimators ++;
-    			this.adwinEnsemble.add(new ADWIN());
+                if (this.driftDetection) {
+                    this.adwinEnsemble.add(new ADWIN());
+                }
     			this.lambdaTP.add(0.0);
                 this.lambdaTN.add(0.0);
                 this.lambdaFP.add(0.0);
diff --git a/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineCSB2.java b/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineCSB2.java
index f7fb8575a..f84805014 100644
--- a/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineCSB2.java
+++ b/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineCSB2.java
@@ -249,7 +249,9 @@ protected void adjustEnsembleSize(int nClasses) {
     		for (int i = this.nEstimators; i < nClasses; i++) {
     			this.ensemble.add(this.baseLearner.copy()); 
     			this.nEstimators ++;
-    			this.adwinEnsemble.add(new ADWIN());    			
+                if (this.driftDetection) {
+                    this.adwinEnsemble.add(new ADWIN());
+                }
     			this.lambdaFP.add(0.0);
                 this.lambdaFN.add(0.0);
                 this.lambdaSum.add(0.0);
diff --git a/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineRUSBoost.java b/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineRUSBoost.java
index 80bd2e828..f9b93d5ea 100644
--- a/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineRUSBoost.java
+++ b/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineRUSBoost.java
@@ -291,7 +291,9 @@ protected void adjustEnsembleSize(int nClasses) {
     		for (int i = this.nEstimators; i < nClasses; i++) {
     			this.ensemble.add(this.baseLearner.copy()); 
     			this.nEstimators ++;
-    			this.adwinEnsemble.add(new ADWIN());
+				if (this.driftDetection) {
+					this.adwinEnsemble.add(new ADWIN());
+				}
     			this.lambdaSc.add(0.0);
                 this.lambdaPos.add(0.0);
                 this.lambdaNeg.add(0.0);
diff --git a/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineSMOTEBagging.java b/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineSMOTEBagging.java
index f4191a558..eaaf8b1ef 100644
--- a/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineSMOTEBagging.java
+++ b/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineSMOTEBagging.java
@@ -231,7 +231,9 @@ protected void adjustEnsembleSize(int nClasses) {
     		for (int i = this.nEstimators; i < nClasses; i++) {
     			this.ensemble.add(this.baseLearner.copy()); 
     			this.nEstimators ++;
-    			this.adwinEnsemble.add(new ADWIN());    			
+				if (this.driftDetection) {
+					this.adwinEnsemble.add(new ADWIN());
+				}
 			}
     	}
     }
diff --git a/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineUnderOverBagging.java b/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineUnderOverBagging.java
index aed93282f..9235dfe5c 100644
--- a/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineUnderOverBagging.java
+++ b/moa/src/main/java/moa/classifiers/meta/imbalanced/OnlineUnderOverBagging.java
@@ -209,7 +209,9 @@ protected void adjustEnsembleSize(int nClasses) {
     		for (int i = this.nEstimators; i < nClasses; i++) {
     			this.ensemble.add(this.baseLearner.copy()); 
     			this.nEstimators ++;
-    			this.adwinEnsemble.add(new ADWIN());    			
+                if (this.driftDetection) {
+                    this.adwinEnsemble.add(new ADWIN());
+                }
 			}
     	}
     }
diff --git a/moa/src/test/resources/moa/classifiers/deeplearning/CAND.ref b/moa/src/test/resources/moa/classifiers/deeplearning/CAND.ref
new file mode 100644
index 000000000..503e74619
--- /dev/null
+++ b/moa/src/test/resources/moa/classifiers/deeplearning/CAND.ref
@@ -0,0 +1,145 @@
+--> classification-out0.arff
+moa.classifiers.deeplearning.CAND -o 2 -B 4 -h -n
+
+Index
+  10000
+Votes
+  0: 0.00238989
+  1: -0.00239092
+Measurements
+  classified instances: 9999
+  classifications correct (percent): 58.04580458
+  Kappa Statistic (percent): 0.4860987
+  Kappa Temporal Statistic (percent): 11.57251265
+  Kappa M Statistic (percent): -2.44200244
+Model measurements
+  model training instances: 9999
+
+Index
+  20000
+Votes
+  0: 0.00238989
+  1: -0.00239092
+Measurements
+  classified instances: 19999
+  classifications correct (percent): 57.20786039
+  Kappa Statistic (percent): 0.47593559
+  Kappa Temporal Statistic (percent): 10.65873264
+  Kappa M Statistic (percent): -2.58930712
+Model measurements
+  model training instances: 19999
+
+Index
+  30000
+Votes
+  0: -0.40148243
+  1: 0.40148208
+Measurements
+  classified instances: 29999
+  classifications correct (percent): 57.39857995
+  Kappa Statistic (percent): 0.49809449
+  Kappa Temporal Statistic (percent): 11.72204186
+  Kappa M Statistic (percent): -2.33824471
+Model measurements
+  model training instances: 29999
+
+Index
+  40000
+Votes
+  0: -0.37733972
+  1: -0.31610203
+Measurements
+  classified instances: 39999
+  classifications correct (percent): 57.30893272
+  Kappa Statistic (percent): 0.91250658
+  Kappa Temporal Statistic (percent): 11.75649837
+  Kappa M Statistic (percent): -2.1291866
+Model measurements
+  model training instances: 39999
+
+Index
+  50000
+Votes
+  0: -0.37733972
+  1: -0.31610203
+Measurements
+  classified instances: 49999
+  classifications correct (percent): 57.3751475
+  Kappa Statistic (percent): 1.11019024
+  Kappa Temporal Statistic (percent): 11.78077655
+  Kappa M Statistic (percent): -1.99081164
+Model measurements
+  model training instances: 49999
+
+Index
+  60000
+Votes
+  0: -0.37733972
+  1: -0.31610203
+Measurements
+  classified instances: 59999
+  classifications correct (percent): 57.22595377
+  Kappa Statistic (percent): 1.3553988
+  Kappa Temporal Statistic (percent): 11.54919869
+  Kappa M Statistic (percent): -1.83318784
+Model measurements
+  model training instances: 59999
+
+Index
+  70000
+Votes
+  0: -0.37733972
+  1: -0.31610203
+Measurements
+  classified instances: 69999
+  classifications correct (percent): 57.10795869
+  Kappa Statistic (percent): 1.46362385
+  Kappa Temporal Statistic (percent): 11.58750258
+  Kappa M Statistic (percent): -1.76247289
+Model measurements
+  model training instances: 69999
+
+Index
+  80000
+Votes
+  0: -0.37733972
+  1: -0.31610203
+Measurements
+  classified instances: 79999
+  classifications correct (percent): 57.18946487
+  Kappa Statistic (percent): 1.72083945
+  Kappa Temporal Statistic (percent): 11.84329069
+  Kappa M Statistic (percent): -1.57788587
+Model measurements
+  model training instances: 79999
+
+Index
+  90000
+Votes
+  0: -0.37733972
+  1: -0.31610203
+Measurements
+  classified instances: 89999
+  classifications correct (percent): 57.20063556
+  Kappa Statistic (percent): 1.74312949
+  Kappa Temporal Statistic (percent): 11.82556942
+  Kappa M Statistic (percent): -1.57964135
+Model measurements
+  model training instances: 89999
+
+Index
+  100000
+Votes
+  0: -0.37733972
+  1: -0.31610203
+Measurements
+  classified instances: 99999
+  classifications correct (percent): 57.17857179
+  Kappa Statistic (percent): 1.93990852
+  Kappa Temporal Statistic (percent): 11.78930455
+  Kappa M Statistic (percent): -1.51486416
+Model measurements
+  model training instances: 99999
+
+
+
diff --git a/moa/src/test/resources/moa/classifiers/deeplearning/MLP.ref b/moa/src/test/resources/moa/classifiers/deeplearning/MLP.ref
new file mode 100644
index 000000000..d6341c7ff
--- /dev/null
+++ b/moa/src/test/resources/moa/classifiers/deeplearning/MLP.ref
@@ -0,0 +1,145 @@
+--> classification-out0.arff
+moa.classifiers.deeplearning.MLP -b 0.3 -o ADAM -h -n -N 9 -B 4
+
+Index
+  10000
+Votes
+  0: -0.07205711
+  1: 0.07205318
+Measurements
+  classified instances: 9999
+  classifications correct (percent): 58.19581958
+  Kappa Statistic (percent): -0.52570582
+  Kappa Temporal Statistic (percent): 11.88870152
+  Kappa M Statistic (percent): -2.07570208
+Model measurements
+  model training instances: 9999
+
+Index
+  20000
+Votes
+  0: -0.07205711
+  1: 0.07205318
+Measurements
+  classified instances: 19999
+  classifications correct (percent): 57.42287114
+  Kappa Statistic (percent): -0.41967972
+  Kappa Temporal Statistic (percent): 11.10763128
+  Kappa M Statistic (percent): -2.0738432
+Model measurements
+  model training instances: 19999
+
+Index
+  30000
+Votes
+  0: -0.07205711
+  1: 0.07205318
+Measurements
+  classified instances: 29999
+  classifications correct (percent): 57.6419214
+  Kappa Statistic (percent): -0.20987283
+  Kappa Temporal Statistic (percent): 12.22628998
+  Kappa M Statistic (percent): -1.75368354
+Model measurements
+  model training instances: 29999
+
+Index
+  40000
+Votes
+  0: -0.07205711
+  1: 0.07205318
+Measurements
+  classified instances: 39999
+  classifications correct (percent): 57.52143804
+  Kappa Statistic (percent): 0.01191783
+  Kappa Temporal Statistic (percent): 12.19575216
+  Kappa M Statistic (percent): -1.6208134
+Model measurements
+  model training instances: 39999
+
+Index
+  50000
+Votes
+  0: -0.07205711
+  1: 0.07205318
+Measurements
+  classified instances: 49999
+  classifications correct (percent): 57.5651513
+  Kappa Statistic (percent): -0.06085172
+  Kappa Temporal Statistic (percent): 12.17402103
+  Kappa M Statistic (percent): -1.53617917
+Model measurements
+  model training instances: 49999
+
+Index
+  60000
+Votes
+  0: -0.07205711
+  1: 0.07205318
+Measurements
+  classified instances: 59999
+  classifications correct (percent): 57.34095568
+  Kappa Statistic (percent): -0.07533908
+  Kappa Temporal Statistic (percent): 11.78700672
+  Kappa M Statistic (percent): -1.55940005
+Model measurements
+  model training instances: 59999
+
+Index
+  70000
+Votes
+  0: -0.07205711
+  1: 0.07205318
+Measurements
+  classified instances: 69999
+  classifications correct (percent): 57.16081658
+  Kappa Statistic (percent): -0.18208267
+  Kappa Temporal Statistic (percent): 11.69645749
+  Kappa M Statistic (percent): -1.63706616
+Model measurements
+  model training instances: 69999
+
+Index
+  80000
+Votes
+  0: -0.07205711
+  1: 0.07205318
+Measurements
+  classified instances: 79999
+  classifications correct (percent): 57.15321442
+  Kappa Statistic (percent): -0.17731317
+  Kappa Temporal Statistic (percent): 11.76864269
+  Kappa M Statistic (percent): -1.66389845
+Model measurements
+  model training instances: 79999
+
+Index
+  90000
+Votes
+  0: -0.07205711
+  1: 0.07205318
+Measurements
+  classified instances: 89999
+  classifications correct (percent): 57.19396882
+  Kappa Statistic (percent): -0.19663467
+  Kappa Temporal Statistic (percent): 11.81183473
+  Kappa M Statistic (percent): -1.59546414
+Model measurements
+  model training instances: 89999
+
+Index
+  100000
+Votes
+  0: -0.07205711
+  1: 0.07205318
+Measurements
+  classified instances: 99999
+  classifications correct (percent): 57.11457115
+  Kappa Statistic (percent): -0.21164186
+  Kappa Temporal Statistic (percent): 11.65746539
+  Kappa M Statistic (percent): -1.66658764
+Model measurements
+  model training instances: 99999
+
+
+
diff --git a/moa/src/test/resources/moa/classifiers/meta/ADOB.ref b/moa/src/test/resources/moa/classifiers/meta/ADOB.ref
index cf2116728..185bce4e2 100644
--- a/moa/src/test/resources/moa/classifiers/meta/ADOB.ref
+++ b/moa/src/test/resources/moa/classifiers/meta/ADOB.ref
@@ -179,29 +179,29 @@ Model measurements
 Index
   60000
 Votes
-  0: 1.18165541
-  1: 6.95943137
+  0: 1.50285956
+  1: 7.41500703
 Measurements
   classified instances: 59999
-  classifications correct (percent): 87.75146252
-  Kappa Statistic (percent): 74.8372763
-  Kappa Temporal Statistic (percent): 74.67172152
-  Kappa M Statistic (percent): 70.8396159
+  classifications correct (percent): 87.73979566
+  Kappa Statistic (percent): 74.81123969
+  Kappa Temporal Statistic (percent): 74.64759607
+  Kappa M Statistic (percent): 70.81184033
 Model measurements
   model training instances: 59999
   ensemble size: 10
-  [avg] model training instances: 55328.65
-  [err] model training instances: 13960.74927591
-  [avg] Change detected: 71.7
-  [err] Change detected: 226.73530823
+  [avg] model training instances: 55414.55
+  [err] model training instances: 13698.37630976
+  [avg] Change detected: 0.6
+  [err] Change detected: 1.8973666
   [avg] Warning detected: 0
   [err] Warning detected: 0
   [avg] tree size (nodes): 83.9
-  [err] tree size (nodes): 45.25593884
+  [err] tree size (nodes): 45.02209334
   [avg] tree size (leaves): 59.1
-  [err] tree size (leaves): 28.73035561
+  [err] tree size (leaves): 28.68778292
   [avg] active learning leaves: 59.1
-  [err] active learning leaves: 28.73035561
+  [err] active learning leaves: 28.68778292
   [avg] tree depth: 4.3
   [err] tree depth: 1.7669811
   [avg] active leaf byte size estimate: 0
@@ -214,31 +214,31 @@ Model measurements
 Index
   70000
 Votes
-  0: 1.47738616
-  1: 6.87183435
+  0: 1.9951562
+  1: 7.09764926
 Measurements
   classified instances: 69999
-  classifications correct (percent): 88.23840341
-  Kappa Statistic (percent): 75.85521504
-  Kappa Temporal Statistic (percent): 75.75605878
-  Kappa M Statistic (percent): 72.09530911
+  classifications correct (percent): 88.19554565
+  Kappa Statistic (percent): 75.77281259
+  Kappa Temporal Statistic (percent): 75.66771695
+  Kappa M Statistic (percent): 71.99362798
 Model measurements
   model training instances: 69999
   ensemble size: 10
-  [avg] model training instances: 64265.35
-  [err] model training instances: 16273.63935383
-  [avg] Change detected: 393
-  [err] Change detected: 1242.77512045
+  [avg] model training instances: 65248.45
+  [err] model training instances: 14040.65650165
+  [avg] Change detected: 0
+  [err] Change detected: 0
   [avg] Warning detected: 0
   [err] Warning detected: 0
-  [avg] tree size (nodes): 98.1
-  [err] tree size (nodes): 48.679108
-  [avg] tree size (leaves): 68.9
-  [err] tree size (leaves): 31.20345422
-  [avg] active learning leaves: 68.9
-  [err] active learning leaves: 31.20345422
-  [avg] tree depth: 4.5
-  [err] tree depth: 1.8408935
+  [avg] tree size (nodes): 101.3
+  [err] tree size (nodes): 44.20168423
+  [avg] tree size (leaves): 71.7
+  [err] tree size (leaves): 27.8649521
+  [avg] active learning leaves: 71.7
+  [err] active learning leaves: 27.8649521
+  [avg] tree depth: 4.8
+  [err] tree depth: 1.13529242
   [avg] active leaf byte size estimate: 0
   [err] active leaf byte size estimate: 0
   [avg] inactive leaf byte size estimate: 0
@@ -249,31 +249,31 @@ Model measurements
 Index
   80000
 Votes
-  0: 2.08648259
-  1: 6.49973266
+  0: 2.08446236
+  1: 7.21012764
 Measurements
   classified instances: 79999
-  classifications correct (percent): 88.69485869
-  Kappa Statistic (percent): 76.78380302
-  Kappa Temporal Statistic (percent): 76.7201215
-  Kappa M Statistic (percent): 73.17594021
+  classifications correct (percent): 88.61985775
+  Kappa Statistic (percent): 76.6452267
+  Kappa Temporal Statistic (percent): 76.56567737
+  Kappa M Statistic (percent): 72.99798315
 Model measurements
   model training instances: 79999
   ensemble size: 10
-  [avg] model training instances: 72912.25
-  [err] model training instances: 18464.40482851
-  [avg] Change detected: 386.7
-  [err] Change detected: 1222.85277119
+  [avg] model training instances: 70717.35
+  [err] model training instances: 21398.06089905
+  [avg] Change detected: 0.5
+  [err] Change detected: 1.58113883
   [avg] Warning detected: 0
   [err] Warning detected: 0
-  [avg] tree size (nodes): 115.5
-  [err] tree size (nodes): 54.64074589
-  [avg] tree size (leaves): 80.3
-  [err] tree size (leaves): 35.08101734
-  [avg] active learning leaves: 80.3
-  [err] active learning leaves: 35.08101734
-  [avg] tree depth: 4.7
-  [err] tree depth: 1.82878223
+  [avg] tree size (nodes): 106.9
+  [err] tree size (nodes): 59.17666582
+  [avg] tree size (leaves): 74.2
+  [err] tree size (leaves): 37.70293239
+  [avg] active learning leaves: 74.2
+  [err] active learning leaves: 37.70293239
+  [avg] tree depth: 4.5
+  [err] tree depth: 1.77951304
   [avg] active leaf byte size estimate: 0
   [err] active leaf byte size estimate: 0
   [avg] inactive leaf byte size estimate: 0
@@ -284,31 +284,31 @@ Model measurements
 Index
   90000
 Votes
-  0: 0.01685327
-  1: 8.77910253
+  0: 0.07476106
+  1: 9.38333924
 Measurements
   classified instances: 89999
-  classifications correct (percent): 89.03210036
-  Kappa Statistic (percent): 77.4657281
-  Kappa Temporal Statistic (percent): 77.4041433
-  Kappa M Statistic (percent): 73.96888186
+  classifications correct (percent): 88.94209936
+  Kappa Statistic (percent): 77.30567473
+  Kappa Temporal Statistic (percent): 77.21872496
+  Kappa M Statistic (percent): 73.75527426
 Model measurements
   model training instances: 89999
   ensemble size: 10
-  [avg] model training instances: 81810.85
-  [err] model training instances: 20686.54878818
-  [avg] Change detected: 386
-  [err] Change detected: 1220.63917682
+  [avg] model training instances: 80002.35
+  [err] model training instances: 21940.61015866
+  [avg] Change detected: 0
+  [err] Change detected: 0
   [avg] Warning detected: 0
   [err] Warning detected: 0
-  [avg] tree size (nodes): 128.4
-  [err] tree size (nodes): 61.28476338
-  [avg] tree size (leaves): 88.7
-  [err] tree size (leaves): 39.18914249
-  [avg] active learning leaves: 88.7
-  [err] active learning leaves: 39.18914249
-  [avg] tree depth: 4.8
-  [err] tree depth: 1.87379591
+  [avg] tree size (nodes): 124.5
+  [err] tree size (nodes): 60.63781365
+  [avg] tree size (leaves): 86.9
+  [err] tree size (leaves): 37.35252483
+  [avg] active learning leaves: 86.9
+  [err] active learning leaves: 37.35252483
+  [avg] tree depth: 4.9
+  [err] tree depth: 1.44913767
   [avg] active leaf byte size estimate: 0
   [err] active leaf byte size estimate: 0
   [avg] inactive leaf byte size estimate: 0
@@ -319,31 +319,31 @@ Model measurements
 Index
   100000
 Votes
-  0: 5.56917916
-  1: 3.43255925
+  0: 4.69667608
+  1: 4.90163782
 Measurements
   classified instances: 99999
-  classifications correct (percent): 89.3698937
-  Kappa Statistic (percent): 78.16336356
-  Kappa Temporal Statistic (percent): 78.10234015
-  Kappa M Statistic (percent): 74.79967759
+  classifications correct (percent): 89.27189272
+  Kappa Statistic (percent): 77.99300662
+  Kappa Temporal Statistic (percent): 77.90046144
+  Kappa M Statistic (percent): 74.567351
 Model measurements
   model training instances: 99999
   ensemble size: 10
-  [avg] model training instances: 90333.05
-  [err] model training instances: 22766.54915597
-  [avg] Change detected: 362.5
-  [err] Change detected: 1146.32565181
+  [avg] model training instances: 89069.15
+  [err] model training instances: 22444.97483385
+  [avg] Change detected: 0
+  [err] Change detected: 0
   [avg] Warning detected: 0
   [err] Warning detected: 0
-  [avg] tree size (nodes): 148
-  [err] tree size (nodes): 63.70068899
-  [avg] tree size (leaves): 102.1
-  [err] tree size (leaves): 41.50354737
-  [avg] active learning leaves: 102.1
-  [err] active learning leaves: 41.50354737
-  [avg] tree depth: 4.8
-  [err] tree depth: 1.87379591
+  [avg] tree size (nodes): 144.2
+  [err] tree size (nodes): 64.69209122
+  [avg] tree size (leaves): 100.2
+  [err] tree size (leaves): 40.22105585
+  [avg] active learning leaves: 100.2
+  [err] active learning leaves: 40.22105585
+  [avg] tree depth: 5
+  [err] tree depth: 1.49071198
   [avg] active leaf byte size estimate: 0
   [err] active leaf byte size estimate: 0
   [avg] inactive leaf byte size estimate: 0
diff --git a/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineAdaBoost.ref b/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineAdaBoost.ref
index b14ddc6e2..9d5629310 100644
--- a/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineAdaBoost.ref
+++ b/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineAdaBoost.ref
@@ -4,140 +4,140 @@ moa.classifiers.meta.imbalanced.OnlineAdaBoost -l bayes.NaiveBayes -s 1 -d
 Index
   10000
 Votes
-  0: 1.88636731
-  1: 1.11363269
+  0: 1.36996538
+  1: 0.63003462
 Measurements
   classified instances: 9999
-  classifications correct (percent): 72.34723472
-  Kappa Statistic (percent): 41.98740193
-  Kappa Temporal Statistic (percent): 41.7158516
-  Kappa M Statistic (percent): 32.47863248
+  classifications correct (percent): 72.38723872
+  Kappa Statistic (percent): 42.04052535
+  Kappa Temporal Statistic (percent): 41.80016863
+  Kappa M Statistic (percent): 32.57631258
 Model measurements
   model training instances: 9999
 
 Index
   20000
 Votes
-  0: 1.27366125
-  1: 1.72633875
+  0: 0.84464357
+  1: 1.15535643
 Measurements
   classified instances: 19999
-  classifications correct (percent): 72.93364668
-  Kappa Statistic (percent): 43.6473115
-  Kappa Temporal Statistic (percent): 43.49096983
-  Kappa M Statistic (percent): 35.11148406
+  classifications correct (percent): 72.88864443
+  Kappa Statistic (percent): 43.51755248
+  Kappa Temporal Statistic (percent): 43.3970143
+  Kappa M Statistic (percent): 35.00359626
 Model measurements
   model training instances: 19999
 
 Index
   30000
 Votes
-  0: 1.3130717
-  1: 1.6869283
+  0: 0.84945612
+  1: 1.15054388
 Measurements
   classified instances: 29999
-  classifications correct (percent): 73.0991033
-  Kappa Statistic (percent): 44.02011205
-  Kappa Temporal Statistic (percent): 44.25640671
-  Kappa M Statistic (percent): 35.37796284
+  classifications correct (percent): 73.13243775
+  Kappa Statistic (percent): 43.99059745
+  Kappa Temporal Statistic (percent): 44.3254818
+  Kappa M Statistic (percent): 35.45803972
 Model measurements
   model training instances: 29999
 
 Index
   40000
 Votes
-  0: 1.08738337
-  1: 1.91261663
+  0: 0.62299175
+  1: 1.37700825
 Measurements
   classified instances: 39999
-  classifications correct (percent): 73.30433261
-  Kappa Statistic (percent): 44.59839686
-  Kappa Temporal Statistic (percent): 44.81938918
-  Kappa M Statistic (percent): 36.13636364
+  classifications correct (percent): 73.34433361
+  Kappa Statistic (percent): 44.52187481
+  Kappa Temporal Statistic (percent): 44.90207224
+  Kappa M Statistic (percent): 36.23205742
 Model measurements
   model training instances: 39999
 
 Index
   50000
 Votes
-  0: 1.11739457
-  1: 1.88260543
+  0: 0.69046993
+  1: 1.30953007
 Measurements
   classified instances: 49999
-  classifications correct (percent): 73.30946619
-  Kappa Statistic (percent): 44.61428418
-  Kappa Temporal Statistic (percent): 44.75949996
-  Kappa M Statistic (percent): 36.1361026
+  classifications correct (percent): 73.37946759
+  Kappa Statistic (percent): 44.56202445
+  Kappa Temporal Statistic (percent): 44.9043795
+  Kappa M Statistic (percent): 36.30359877
 Model measurements
   model training instances: 49999
 
 Index
   60000
 Votes
-  0: 0.71085887
-  1: 2.28914113
+  0: 0.42464497
+  1: 1.57535503
 Measurements
   classified instances: 59999
-  classifications correct (percent): 73.43289055
-  Kappa Statistic (percent): 44.98063681
-  Kappa Temporal Statistic (percent): 45.0628985
-  Kappa M Statistic (percent): 36.7510515
+  classifications correct (percent): 73.48455808
+  Kappa Statistic (percent): 44.86333451
+  Kappa Temporal Statistic (percent): 45.16973979
+  Kappa M Statistic (percent): 36.87405761
 Model measurements
   model training instances: 59999
 
 Index
   70000
 Votes
-  0: 1.36770198
-  1: 1.63229802
+  0: 0.88718711
+  1: 1.11281289
 Measurements
   classified instances: 69999
-  classifications correct (percent): 73.49962142
-  Kappa Statistic (percent): 45.18450538
-  Kappa Temporal Statistic (percent): 45.37530552
-  Kappa M Statistic (percent): 37.1271692
+  classifications correct (percent): 73.54962214
+  Kappa Statistic (percent): 45.05363787
+  Kappa Temporal Statistic (percent): 45.47837098
+  Kappa M Statistic (percent): 37.24579718
 Model measurements
   model training instances: 69999
 
 Index
   80000
 Votes
-  0: 1.66319814
-  1: 1.33680186
+  0: 1.13565681
+  1: 0.86434319
 Measurements
   classified instances: 79999
-  classifications correct (percent): 73.51466893
-  Kappa Statistic (percent): 45.23749894
-  Kappa Temporal Statistic (percent): 45.46062962
-  Kappa M Statistic (percent): 37.15743267
+  classifications correct (percent): 73.58841986
+  Kappa Statistic (percent): 45.14343374
+  Kappa Temporal Statistic (percent): 45.61249968
+  Kappa M Statistic (percent): 37.33242378
 Model measurements
   model training instances: 79999
 
 Index
   90000
 Votes
-  0: 1.57145529
-  1: 1.42854471
+  0: 1.03158512
+  1: 0.96841488
 Measurements
   classified instances: 89999
-  classifications correct (percent): 73.58526206
-  Kappa Statistic (percent): 45.38710875
-  Kappa Temporal Statistic (percent): 45.580863
-  Kappa M Statistic (percent): 37.30748945
+  classifications correct (percent): 73.64970722
+  Kappa Statistic (percent): 45.26237993
+  Kappa Temporal Statistic (percent): 45.71363168
+  Kappa M Statistic (percent): 37.46044304
 Model measurements
   model training instances: 89999
 
 Index
   100000
 Votes
-  0: 2.30983074
-  1: 0.69016926
+  0: 1.63563168
+  1: 0.36436832
 Measurements
   classified instances: 99999
-  classifications correct (percent): 73.63273633
-  Kappa Statistic (percent): 45.51632958
-  Kappa Temporal Statistic (percent): 45.68432762
-  Kappa M Statistic (percent): 37.49229529
+  classifications correct (percent): 73.70573706
+  Kappa Statistic (percent): 45.40453478
+  Kappa Temporal Statistic (percent): 45.83470666
+  Kappa M Statistic (percent): 37.66535489
 Model measurements
   model training instances: 99999
 
diff --git a/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineAdaC2.ref b/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineAdaC2.ref
index ee77bf05b..2d9dd33c8 100644
--- a/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineAdaC2.ref
+++ b/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineAdaC2.ref
@@ -4,140 +4,140 @@ moa.classifiers.meta.imbalanced.OnlineAdaC2 -l bayes.NaiveBayes -s 1 -d
 Index
   10000
 Votes
-  0: 1.59648695
-  1: 1.40351305
+  0: 0.9992297
+  1: 1.0007703
 Measurements
   classified instances: 9999
-  classifications correct (percent): 68.19681968
-  Kappa Statistic (percent): 27.09522453
-  Kappa Temporal Statistic (percent): 32.96795953
-  Kappa M Statistic (percent): 22.34432234
+  classifications correct (percent): 66.52665267
+  Kappa Statistic (percent): 22.04107013
+  Kappa Temporal Statistic (percent): 29.44772344
+  Kappa M Statistic (percent): 18.26617827
 Model measurements
   model training instances: 9999
 
 Index
   20000
 Votes
-  0: 0.9783894
-  1: 2.0216106
+  0: 0.57760733
+  1: 1.42239267
 Measurements
   classified instances: 19999
-  classifications correct (percent): 68.84344217
-  Kappa Statistic (percent): 29.67790628
-  Kappa Temporal Statistic (percent): 34.95145631
-  Kappa M Statistic (percent): 25.30568209
+  classifications correct (percent): 66.07330367
+  Kappa Statistic (percent): 22.057869
+  Kappa Temporal Statistic (percent): 29.1679716
+  Kappa M Statistic (percent): 18.66458883
 Model measurements
   model training instances: 19999
 
 Index
   30000
 Votes
-  0: 1.02849527
-  1: 1.97150473
+  0: 0.5684988
+  1: 1.4315012
 Measurements
   classified instances: 29999
-  classifications correct (percent): 69.09563652
-  Kappa Statistic (percent): 30.18025695
-  Kappa Temporal Statistic (percent): 35.96048905
-  Kappa M Statistic (percent): 25.7607303
+  classifications correct (percent): 66.0488683
+  Kappa Statistic (percent): 21.8382449
+  Kappa Temporal Statistic (percent): 29.64702632
+  Kappa M Statistic (percent): 18.44170404
 Model measurements
   model training instances: 29999
 
 Index
   40000
 Votes
-  0: 0.84795271
-  1: 2.15204729
+  0: 0.40138332
+  1: 1.59861668
 Measurements
   classified instances: 39999
-  classifications correct (percent): 69.14172854
-  Kappa Statistic (percent): 30.52340369
-  Kappa Temporal Statistic (percent): 36.21518268
-  Kappa M Statistic (percent): 26.17822967
+  classifications correct (percent): 65.93164829
+  Kappa Statistic (percent): 21.83574893
+  Kappa Temporal Statistic (percent): 29.57986667
+  Kappa M Statistic (percent): 18.49880383
 Model measurements
   model training instances: 39999
 
 Index
   50000
 Votes
-  0: 0.81004923
-  1: 2.18995077
+  0: 0.43014837
+  1: 1.56985163
 Measurements
   classified instances: 49999
-  classifications correct (percent): 69.09538191
-  Kappa Statistic (percent): 30.3705114
-  Kappa Temporal Statistic (percent): 36.03775147
-  Kappa M Statistic (percent): 26.05283308
+  classifications correct (percent): 65.94131883
+  Kappa Statistic (percent): 21.82976857
+  Kappa Temporal Statistic (percent): 29.5098932
+  Kappa M Statistic (percent): 18.50593415
 Model measurements
   model training instances: 49999
 
 Index
   60000
 Votes
-  0: 0.57329225
-  1: 2.42670775
+  0: 0.27096561
+  1: 1.72903439
 Measurements
   classified instances: 59999
-  classifications correct (percent): 69.07948466
-  Kappa Statistic (percent): 30.59532836
-  Kappa Temporal Statistic (percent): 36.06065828
-  Kappa M Statistic (percent): 26.3867947
+  classifications correct (percent): 65.88276471
+  Kappa Statistic (percent): 22.01747794
+  Kappa Temporal Statistic (percent): 29.45028434
+  Kappa M Statistic (percent): 18.7762876
 Model measurements
   model training instances: 59999
 
 Index
   70000
 Votes
-  0: 1.06595173
-  1: 1.93404827
+  0: 0.60620282
+  1: 1.39379718
 Measurements
   classified instances: 69999
-  classifications correct (percent): 69.09955857
-  Kappa Statistic (percent): 30.82784493
-  Kappa Temporal Statistic (percent): 36.30554492
-  Kappa M Statistic (percent): 26.68790672
+  classifications correct (percent): 65.88665552
+  Kappa Statistic (percent): 22.26514238
+  Kappa Temporal Statistic (percent): 29.68285285
+  Kappa M Statistic (percent): 19.0652115
 Model measurements
   model training instances: 69999
 
 Index
   80000
 Votes
-  0: 1.37066262
-  1: 1.62933738
+  0: 0.80584033
+  1: 1.19415967
 Measurements
   classified instances: 79999
-  classifications correct (percent): 69.17961475
-  Kappa Statistic (percent): 31.02245794
-  Kappa Temporal Statistic (percent): 36.53375891
-  Kappa M Statistic (percent): 26.87151501
+  classifications correct (percent): 65.9758247
+  Kappa Statistic (percent): 22.49556408
+  Kappa Temporal Statistic (percent): 29.9364205
+  Kappa M Statistic (percent): 19.26978289
 Model measurements
   model training instances: 79999
 
 Index
   90000
 Votes
-  0: 1.26552333
-  1: 1.73447667
+  0: 0.71782828
+  1: 1.28217172
 Measurements
   classified instances: 89999
-  classifications correct (percent): 69.26965855
-  Kappa Statistic (percent): 31.23341346
-  Kappa Temporal Statistic (percent): 36.68993934
-  Kappa M Statistic (percent): 27.06487342
+  classifications correct (percent): 66.07073412
+  Kappa Statistic (percent): 22.72661145
+  Kappa Temporal Statistic (percent): 30.09957651
+  Kappa M Statistic (percent): 19.47257384
 Model measurements
   model training instances: 89999
 
 Index
   100000
 Votes
-  0: 1.80621758
-  1: 1.19378242
+  0: 1.19653224
+  1: 0.80346776
 Measurements
   classified instances: 99999
-  classifications correct (percent): 69.24869249
-  Kappa Statistic (percent): 31.2530118
-  Kappa Temporal Statistic (percent): 36.65334542
-  Kappa M Statistic (percent): 27.09923664
+  classifications correct (percent): 66.099661
+  Kappa Statistic (percent): 22.88504154
+  Kappa Temporal Statistic (percent): 30.16644693
+  Kappa M Statistic (percent): 19.63396709
 Model measurements
   model training instances: 99999
 
diff --git a/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineCSB2.ref b/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineCSB2.ref
index 290438871..dda5a6501 100644
--- a/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineCSB2.ref
+++ b/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineCSB2.ref
@@ -4,140 +4,140 @@ moa.classifiers.meta.imbalanced.OnlineCSB2 -l bayes.NaiveBayes -s 1 -d
 Index
   10000
 Votes
-  0: 1.29452484
-  1: 1.70547516
+  0: 0.87817912
+  1: 1.12182088
 Measurements
   classified instances: 9999
-  classifications correct (percent): 60.97609761
-  Kappa Statistic (percent): 10.41629729
-  Kappa Temporal Statistic (percent): 17.74873524
-  Kappa M Statistic (percent): 4.71306471
+  classifications correct (percent): 61.86618662
+  Kappa Statistic (percent): 10.14181125
+  Kappa Temporal Statistic (percent): 19.62478921
+  Kappa M Statistic (percent): 6.88644689
 Model measurements
   model training instances: 9999
 
 Index
   20000
 Votes
-  0: 1.05369061
-  1: 1.94630939
+  0: 0.68410525
+  1: 1.31589475
 Measurements
   classified instances: 19999
-  classifications correct (percent): 60.8480424
-  Kappa Statistic (percent): 11.95959308
-  Kappa Temporal Statistic (percent): 18.25869089
-  Kappa M Statistic (percent): 6.13761688
+  classifications correct (percent): 60.27301365
+  Kappa Statistic (percent): 6.64556861
+  Kappa Temporal Statistic (percent): 17.05814803
+  Kappa M Statistic (percent): 4.75905059
 Model measurements
   model training instances: 19999
 
 Index
   30000
 Votes
-  0: 1.56257541
-  1: 1.43742459
+  0: 0.6056291
+  1: 1.3943709
 Measurements
   classified instances: 29999
-  classifications correct (percent): 61.01536718
-  Kappa Statistic (percent): 12.71323278
-  Kappa Temporal Statistic (percent): 19.21668854
-  Kappa M Statistic (percent): 6.35009609
+  classifications correct (percent): 59.73199107
+  Kappa Statistic (percent): 4.65293506
+  Kappa Temporal Statistic (percent): 16.55729778
+  Kappa M Statistic (percent): 3.26713645
 Model measurements
   model training instances: 29999
 
 Index
   40000
 Votes
-  0: 1.6486455
-  1: 1.3513545
+  0: 0.73642669
+  1: 1.26357331
 Measurements
   classified instances: 39999
-  classifications correct (percent): 61.09402735
-  Kappa Statistic (percent): 13.34877652
-  Kappa Temporal Statistic (percent): 19.58038344
-  Kappa M Statistic (percent): 6.92583732
+  classifications correct (percent): 59.24148104
+  Kappa Statistic (percent): 3.61418848
+  Kappa Temporal Statistic (percent): 15.75112397
+  Kappa M Statistic (percent): 2.49401914
 Model measurements
   model training instances: 39999
 
 Index
   50000
 Votes
-  0: 1.19384937
-  1: 1.80615063
+  0: 0.50336968
+  1: 1.49663032
 Measurements
   classified instances: 49999
-  classifications correct (percent): 61.29322586
-  Kappa Statistic (percent): 13.9195041
-  Kappa Temporal Statistic (percent): 19.88989155
-  Kappa M Statistic (percent): 7.38418836
+  classifications correct (percent): 59.09918198
+  Kappa Statistic (percent): 3.09352267
+  Kappa Temporal Statistic (percent): 15.34895273
+  Kappa M Statistic (percent): 2.13437979
 Model measurements
   model training instances: 49999
 
 Index
   60000
 Votes
-  0: 0.67605129
-  1: 2.32394871
+  0: 0.57780274
+  1: 1.42219726
 Measurements
   classified instances: 59999
-  classifications correct (percent): 61.60436007
-  Kappa Statistic (percent): 15.00993096
-  Kappa Temporal Statistic (percent): 20.60313631
-  Kappa M Statistic (percent): 8.59058805
+  classifications correct (percent): 58.79764663
+  Kappa Statistic (percent): 2.73745097
+  Kappa Temporal Statistic (percent): 14.79924177
+  Kappa M Statistic (percent): 1.90857868
 Model measurements
   model training instances: 59999
 
 Index
   70000
 Votes
-  0: 1.52340413
-  1: 1.47659587
+  0: 0.65151193
+  1: 1.34848807
 Measurements
   classified instances: 69999
-  classifications correct (percent): 61.98374262
-  Kappa Statistic (percent): 16.12309724
-  Kappa Temporal Statistic (percent): 21.63785742
-  Kappa M Statistic (percent): 9.80545011
+  classifications correct (percent): 58.59655138
+  Kappa Statistic (percent): 2.50807919
+  Kappa Temporal Statistic (percent): 14.6559086
+  Kappa M Statistic (percent): 1.76925163
 Model measurements
   model training instances: 69999
 
 Index
   80000
 Votes
-  0: 1.32764396
-  1: 1.67235604
+  0: 0.79609062
+  1: 1.20390938
 Measurements
   classified instances: 79999
-  classifications correct (percent): 62.36452956
-  Kappa Statistic (percent): 17.0531039
-  Kappa Temporal Statistic (percent): 22.49993565
-  Kappa M Statistic (percent): 10.70115079
+  classifications correct (percent): 58.54448181
+  Kappa Statistic (percent): 2.32348672
+  Kappa Temporal Statistic (percent): 14.6335813
+  Kappa M Statistic (percent): 1.63720489
 Model measurements
   model training instances: 79999
 
 Index
   90000
 Votes
-  0: 1.27513464
-  1: 1.72486536
+  0: 0.72276703
+  1: 1.27723297
 Measurements
   classified instances: 89999
-  classifications correct (percent): 62.75847509
-  Kappa Statistic (percent): 17.98231492
-  Kappa Temporal Statistic (percent): 23.27572393
-  Kappa M Statistic (percent): 11.61128692
+  classifications correct (percent): 58.53731708
+  Kappa Statistic (percent): 2.24014844
+  Kappa Temporal Statistic (percent): 14.57937507
+  Kappa M Statistic (percent): 1.592827
 Model measurements
   model training instances: 89999
 
 Index
   100000
 Votes
-  0: 1.84987127
-  1: 1.15012873
+  0: 0.96848744
+  1: 1.03151256
 Measurements
   classified instances: 99999
-  classifications correct (percent): 63.06263063
-  Kappa Statistic (percent): 18.79008642
-  Kappa Temporal Statistic (percent): 23.91026697
-  Kappa M Statistic (percent): 12.43421365
+  classifications correct (percent): 58.44758448
+  Kappa Statistic (percent): 2.10241824
+  Kappa Temporal Statistic (percent): 14.40342782
+  Kappa M Statistic (percent): 1.49352805
 Model measurements
   model training instances: 99999
 
diff --git a/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineRUSBoost.ref b/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineRUSBoost.ref
index a4a076601..fdc0c8298 100644
--- a/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineRUSBoost.ref
+++ b/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineRUSBoost.ref
@@ -4,140 +4,140 @@ moa.classifiers.meta.imbalanced.OnlineRUSBoost -l bayes.NaiveBayes -s 1 -d
 Index
   10000
 Votes
-  0: 2.21739921
-  1: 0.78260079
+  0: 1.61511797
+  1: 0.38488203
 Measurements
   classified instances: 9999
-  classifications correct (percent): 62.98629863
-  Kappa Statistic (percent): 30.35886648
-  Kappa Temporal Statistic (percent): 21.9856661
-  Kappa M Statistic (percent): 9.62148962
+  classifications correct (percent): 62.81628163
+  Kappa Statistic (percent): 30.24083954
+  Kappa Temporal Statistic (percent): 21.62731872
+  Kappa M Statistic (percent): 9.20634921
 Model measurements
   model training instances: 9999
 
 Index
   20000
 Votes
-  0: 1.69385194
-  1: 1.30614806
+  0: 1.19116487
+  1: 0.80883513
 Measurements
   classified instances: 19999
-  classifications correct (percent): 63.11815591
-  Kappa Statistic (percent): 30.49308631
-  Kappa Temporal Statistic (percent): 22.99822528
-  Kappa M Statistic (percent): 11.57995684
+  classifications correct (percent): 62.36311816
+  Kappa Statistic (percent): 29.39988501
+  Kappa Temporal Statistic (percent): 21.42186032
+  Kappa M Statistic (percent): 9.76983937
 Model measurements
   model training instances: 19999
 
 Index
   30000
 Votes
-  0: 1.69816723
-  1: 1.30183277
+  0: 1.2180754
+  1: 0.7819246
 Measurements
   classified instances: 29999
-  classifications correct (percent): 63.3721124
-  Kappa Statistic (percent): 31.08787264
-  Kappa Temporal Statistic (percent): 24.10029702
-  Kappa M Statistic (percent): 12.01153107
+  classifications correct (percent): 62.24874162
+  Kappa Statistic (percent): 29.38589548
+  Kappa Temporal Statistic (percent): 21.77246667
+  Kappa M Statistic (percent): 9.31294042
 Model measurements
   model training instances: 29999
 
 Index
   40000
 Votes
-  0: 1.38051629
-  1: 1.61948371
+  0: 0.90661791
+  1: 1.09338209
 Measurements
   classified instances: 39999
-  classifications correct (percent): 63.39658491
-  Kappa Statistic (percent): 31.11899773
-  Kappa Temporal Statistic (percent): 24.3398274
-  Kappa M Statistic (percent): 12.43421053
+  classifications correct (percent): 62.17905448
+  Kappa Statistic (percent): 29.25299592
+  Kappa Temporal Statistic (percent): 21.82316159
+  Kappa M Statistic (percent): 9.5215311
 Model measurements
   model training instances: 39999
 
 Index
   50000
 Votes
-  0: 1.52444719
-  1: 1.47555281
+  0: 1.05715394
+  1: 0.94284606
 Measurements
   classified instances: 49999
-  classifications correct (percent): 63.36126723
-  Kappa Statistic (percent): 31.05962921
-  Kappa Temporal Statistic (percent): 24.17004719
-  Kappa M Statistic (percent): 12.33250383
+  classifications correct (percent): 62.0352407
+  Kappa Statistic (percent): 29.01923297
+  Kappa Temporal Statistic (percent): 21.4256147
+  Kappa M Statistic (percent): 9.15964778
 Model measurements
   model training instances: 49999
 
 Index
   60000
 Votes
-  0: 1.31868908
-  1: 1.68131092
+  0: 0.84227582
+  1: 1.15772418
 Measurements
   classified instances: 59999
-  classifications correct (percent): 63.43939066
-  Kappa Statistic (percent): 31.14134807
-  Kappa Temporal Statistic (percent): 24.39772531
-  Kappa M Statistic (percent): 12.95928895
+  classifications correct (percent): 62.08770146
+  Kappa Statistic (percent): 29.0532165
+  Kappa Temporal Statistic (percent): 21.60261933
+  Kappa M Statistic (percent): 9.74129037
 Model measurements
   model training instances: 59999
 
 Index
   70000
 Votes
-  0: 1.73964858
-  1: 1.26035142
+  0: 1.24673865
+  1: 0.75326135
 Measurements
   classified instances: 69999
-  classifications correct (percent): 63.65662367
-  Kappa Statistic (percent): 31.48625391
-  Kappa Temporal Statistic (percent): 25.08613328
-  Kappa M Statistic (percent): 13.77440347
+  classifications correct (percent): 62.26231803
+  Kappa Statistic (percent): 29.31387548
+  Kappa Temporal Statistic (percent): 22.21207927
+  Kappa M Statistic (percent): 10.46637744
 Model measurements
   model training instances: 69999
 
 Index
   80000
 Votes
-  0: 2.05383874
-  1: 0.94616126
+  0: 1.49956246
+  1: 0.50043754
 Measurements
   classified instances: 79999
-  classifications correct (percent): 63.6157952
-  Kappa Statistic (percent): 31.41301121
-  Kappa Temporal Statistic (percent): 25.07657855
-  Kappa M Statistic (percent): 13.67006762
+  classifications correct (percent): 62.19327742
+  Kappa Statistic (percent): 29.2000459
+  Kappa Temporal Statistic (percent): 22.14728822
+  Kappa M Statistic (percent): 10.29481552
 Model measurements
   model training instances: 79999
 
 Index
   90000
 Votes
-  0: 2.01051521
-  1: 0.98948479
+  0: 1.44863596
+  1: 0.55136404
 Measurements
   classified instances: 89999
-  classifications correct (percent): 63.64070712
-  Kappa Statistic (percent): 31.46258511
-  Kappa Temporal Statistic (percent): 25.09328145
-  Kappa M Statistic (percent): 13.70516878
+  classifications correct (percent): 62.20291337
+  Kappa Statistic (percent): 29.22806824
+  Kappa Temporal Statistic (percent): 22.1311663
+  Kappa M Statistic (percent): 10.29272152
 Model measurements
   model training instances: 89999
 
 Index
   100000
 Votes
-  0: 2.75130663
-  1: 0.24869337
+  0: 1.89375069
+  1: 0.10624931
 Measurements
   classified instances: 99999
-  classifications correct (percent): 63.6796368
-  Kappa Statistic (percent): 31.52215539
-  Kappa Temporal Statistic (percent): 25.18127884
-  Kappa M Statistic (percent): 13.89692286
+  classifications correct (percent): 62.27362274
+  Kappa Statistic (percent): 29.34242695
+  Kappa Temporal Statistic (percent): 22.28493738
+  Kappa M Statistic (percent): 10.56374757
 Model measurements
   model training instances: 99999
 
diff --git a/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineSMOTEBagging.ref b/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineSMOTEBagging.ref
index c0733187c..353fe609b 100644
--- a/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineSMOTEBagging.ref
+++ b/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineSMOTEBagging.ref
@@ -4,140 +4,140 @@ moa.classifiers.meta.imbalanced.OnlineSMOTEBagging -l bayes.NaiveBayes -s 1 -d
 Index
   10000
 Votes
-  0: 1.85208303
-  1: 1.14791697
+  0: 1.26408325
+  1: 0.73591675
 Measurements
   classified instances: 9999
-  classifications correct (percent): 72.59725973
-  Kappa Statistic (percent): 40.49956178
-  Kappa Temporal Statistic (percent): 42.24283305
-  Kappa M Statistic (percent): 33.08913309
+  classifications correct (percent): 73.00730073
+  Kappa Statistic (percent): 42.12432642
+  Kappa Temporal Statistic (percent): 43.10708263
+  Kappa M Statistic (percent): 34.09035409
 Model measurements
   model training instances: 9999
 
 Index
   20000
 Votes
-  0: 0.99513423
-  1: 2.00486577
+  0: 0.70511518
+  1: 1.29488482
 Measurements
   classified instances: 19999
-  classifications correct (percent): 73.02365118
-  Kappa Statistic (percent): 42.00526931
-  Kappa Temporal Statistic (percent): 43.67888089
-  Kappa M Statistic (percent): 35.32725965
+  classifications correct (percent): 73.18365918
+  Kappa Statistic (percent): 43.0454457
+  Kappa Temporal Statistic (percent): 44.01294498
+  Kappa M Statistic (percent): 35.7108607
 Model measurements
   model training instances: 19999
 
 Index
   30000
 Votes
-  0: 1.00455087
-  1: 1.99544913
+  0: 0.69200629
+  1: 1.30799371
 Measurements
   classified instances: 29999
-  classifications correct (percent): 73.11910397
-  Kappa Statistic (percent): 42.19525344
-  Kappa Temporal Statistic (percent): 44.29785176
-  Kappa M Statistic (percent): 35.42600897
+  classifications correct (percent): 73.23577453
+  Kappa Statistic (percent): 43.16850334
+  Kappa Temporal Statistic (percent): 44.53961456
+  Kappa M Statistic (percent): 35.70627803
 Model measurements
   model training instances: 29999
 
 Index
   40000
 Votes
-  0: 0.63865124
-  1: 2.36134876
+  0: 0.48511383
+  1: 1.51488617
 Measurements
   classified instances: 39999
-  classifications correct (percent): 73.26933173
-  Kappa Statistic (percent): 42.67740187
-  Kappa Temporal Statistic (percent): 44.7470415
-  Kappa M Statistic (percent): 36.05263158
+  classifications correct (percent): 73.34933373
+  Kappa Statistic (percent): 43.57126141
+  Kappa Temporal Statistic (percent): 44.91240763
+  Kappa M Statistic (percent): 36.24401914
 Model measurements
   model training instances: 39999
 
 Index
   50000
 Votes
-  0: 0.8445044
-  1: 2.1554956
+  0: 0.60231262
+  1: 1.39768738
 Measurements
   classified instances: 49999
-  classifications correct (percent): 73.25146503
-  Kappa Statistic (percent): 42.63410171
-  Kappa Temporal Statistic (percent): 44.63945691
-  Kappa M Statistic (percent): 35.99732006
+  classifications correct (percent): 73.38146763
+  Kappa Statistic (percent): 43.64104955
+  Kappa Temporal Statistic (percent): 44.90851892
+  Kappa M Statistic (percent): 36.30838438
 Model measurements
   model training instances: 49999
 
 Index
   60000
 Votes
-  0: 0.44041441
-  1: 2.55958559
+  0: 0.33459367
+  1: 1.66540633
 Measurements
   classified instances: 59999
-  classifications correct (percent): 73.31622194
-  Kappa Statistic (percent): 42.91457071
-  Kappa Temporal Statistic (percent): 44.82164398
-  Kappa M Statistic (percent): 36.47329577
+  classifications correct (percent): 73.41122352
+  Kappa Statistic (percent): 43.82728061
+  Kappa Temporal Statistic (percent): 45.01809409
+  Kappa M Statistic (percent): 36.6994683
 Model measurements
   model training instances: 59999
 
 Index
   70000
 Votes
-  0: 1.03810844
-  1: 1.96189156
+  0: 0.74959303
+  1: 1.25040697
 Measurements
   classified instances: 69999
-  classifications correct (percent): 73.32390463
-  Kappa Statistic (percent): 43.02800681
-  Kappa Temporal Statistic (percent): 45.01310404
-  Kappa M Statistic (percent): 36.71027657
+  classifications correct (percent): 73.44533493
+  Kappa Statistic (percent): 43.97205669
+  Kappa Temporal Statistic (percent): 45.26340587
+  Kappa M Statistic (percent): 36.9983731
 Model measurements
   model training instances: 69999
 
 Index
   80000
 Votes
-  0: 1.53084956
-  1: 1.46915044
+  0: 1.071065
+  1: 0.928935
 Measurements
   classified instances: 79999
-  classifications correct (percent): 73.31716646
-  Kappa Statistic (percent): 43.02525917
-  Kappa Temporal Statistic (percent): 45.05392674
-  Kappa M Statistic (percent): 36.68881243
+  classifications correct (percent): 73.44591807
+  Kappa Statistic (percent): 43.98063242
+  Kappa Temporal Statistic (percent): 45.31905583
+  Kappa M Statistic (percent): 36.99430537
 Model measurements
   model training instances: 79999
 
 Index
   90000
 Votes
-  0: 1.41392948
-  1: 1.58607052
+  0: 1.01617733
+  1: 0.98382267
 Measurements
   classified instances: 89999
-  classifications correct (percent): 73.33970377
-  Kappa Statistic (percent): 43.07787894
-  Kappa Temporal Statistic (percent): 45.07496852
-  Kappa M Statistic (percent): 36.72468354
+  classifications correct (percent): 73.48859432
+  Kappa Statistic (percent): 44.07497264
+  Kappa Temporal Statistic (percent): 45.38170997
+  Kappa M Statistic (percent): 37.07805907
 Model measurements
   model training instances: 89999
 
 Index
   100000
 Votes
-  0: 2.59720709
-  1: 0.40279291
+  0: 1.76479808
+  1: 0.23520192
 Measurements
   classified instances: 99999
-  classifications correct (percent): 73.32173322
-  Kappa Statistic (percent): 43.08319534
-  Kappa Temporal Statistic (percent): 45.04367172
-  Kappa M Statistic (percent): 36.75501399
+  classifications correct (percent): 73.50773508
+  Kappa Statistic (percent): 44.14811543
+  Kappa Temporal Statistic (percent): 45.42682927
+  Kappa M Statistic (percent): 37.19596036
 Model measurements
   model training instances: 99999
 
diff --git a/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineUnderOverBagging.ref b/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineUnderOverBagging.ref
index 9f6c51347..d3a3afff9 100644
--- a/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineUnderOverBagging.ref
+++ b/moa/src/test/resources/moa/classifiers/meta/imbalanced/OnlineUnderOverBagging.ref
@@ -4,140 +4,140 @@ moa.classifiers.meta.imbalanced.OnlineUnderOverBagging -l bayes.NaiveBayes -s 1
 Index
   10000
 Votes
-  0: 1.40184819
-  1: 1.59815181
+  0: 1.03163334
+  1: 0.96836666
 Measurements
   classified instances: 9999
-  classifications correct (percent): 70.0470047
-  Kappa Statistic (percent): 32.1442941
-  Kappa Temporal Statistic (percent): 36.86762226
-  Kappa M Statistic (percent): 26.86202686
+  classifications correct (percent): 69.9869987
+  Kappa Statistic (percent): 31.91905703
+  Kappa Temporal Statistic (percent): 36.74114671
+  Kappa M Statistic (percent): 26.71550672
 Model measurements
   model training instances: 9999
 
 Index
   20000
 Votes
-  0: 0.61733266
-  1: 2.38266734
+  0: 0.45383873
+  1: 1.54616127
 Measurements
   classified instances: 19999
-  classifications correct (percent): 69.94849742
-  Kappa Statistic (percent): 32.79938902
-  Kappa Temporal Statistic (percent): 37.25858649
-  Kappa M Statistic (percent): 27.95492688
+  classifications correct (percent): 69.79848992
+  Kappa Statistic (percent): 32.39377549
+  Kappa Temporal Statistic (percent): 36.9454014
+  Kappa M Statistic (percent): 27.59530089
 Model measurements
   model training instances: 19999
 
 Index
   30000
 Votes
-  0: 0.68148947
-  1: 2.31851053
+  0: 0.47721444
+  1: 1.52278556
 Measurements
   classified instances: 29999
-  classifications correct (percent): 69.96233208
-  Kappa Statistic (percent): 32.74216512
-  Kappa Temporal Statistic (percent): 37.75644125
-  Kappa M Statistic (percent): 27.84272902
+  classifications correct (percent): 69.84899497
+  Kappa Statistic (percent): 32.4242055
+  Kappa Temporal Statistic (percent): 37.52158596
+  Kappa M Statistic (percent): 27.57046765
 Model measurements
   model training instances: 29999
 
 Index
   40000
 Votes
-  0: 0.40489692
-  1: 2.59510308
+  0: 0.24928672
+  1: 1.75071328
 Measurements
   classified instances: 39999
-  classifications correct (percent): 69.94674867
-  Kappa Statistic (percent): 32.91913706
-  Kappa Temporal Statistic (percent): 37.87917937
-  Kappa M Statistic (percent): 28.10406699
+  classifications correct (percent): 69.85424636
+  Kappa Statistic (percent): 32.65905583
+  Kappa Temporal Statistic (percent): 37.68797478
+  Kappa M Statistic (percent): 27.88277512
 Model measurements
   model training instances: 39999
 
 Index
   50000
 Votes
-  0: 0.5101611
-  1: 2.4898389
+  0: 0.34274108
+  1: 1.65725892
 Measurements
   classified instances: 49999
-  classifications correct (percent): 69.98339967
-  Kappa Statistic (percent): 32.98884026
-  Kappa Temporal Statistic (percent): 37.87565196
-  Kappa M Statistic (percent): 28.17764165
+  classifications correct (percent): 69.89539791
+  Kappa Statistic (percent): 32.73716607
+  Kappa Temporal Statistic (percent): 37.69351768
+  Kappa M Statistic (percent): 27.96707504
 Model measurements
   model training instances: 49999
 
 Index
   60000
 Votes
-  0: 0.26979993
-  1: 2.73020007
+  0: 0.17936704
+  1: 1.82063296
 Measurements
   classified instances: 59999
-  classifications correct (percent): 70.06283438
-  Kappa Statistic (percent): 33.40813955
-  Kappa Temporal Statistic (percent): 38.09408926
-  Kappa M Statistic (percent): 28.72787874
+  classifications correct (percent): 69.98449974
+  Kappa Statistic (percent): 33.17486013
+  Kappa Temporal Statistic (percent): 37.93210408
+  Kappa M Statistic (percent): 28.5413856
 Model measurements
   model training instances: 59999
 
 Index
   70000
 Votes
-  0: 0.74793955
-  1: 2.25206045
+  0: 0.48963286
+  1: 1.51036714
 Measurements
   classified instances: 69999
-  classifications correct (percent): 70.04671495
-  Kappa Statistic (percent): 33.54441662
-  Kappa Temporal Statistic (percent): 38.25789923
-  Kappa M Statistic (percent): 28.93505965
+  classifications correct (percent): 69.99957142
+  Kappa Statistic (percent): 33.38843877
+  Kappa Temporal Statistic (percent): 38.16072323
+  Kappa M Statistic (percent): 28.82321041
 Model measurements
   model training instances: 69999
 
 Index
   80000
 Votes
-  0: 1.13871423
-  1: 1.86128577
+  0: 0.77581225
+  1: 1.22418775
 Measurements
   classified instances: 79999
-  classifications correct (percent): 70.1196265
-  Kappa Statistic (percent): 33.72450454
-  Kappa Temporal Statistic (percent): 38.46945867
-  Kappa M Statistic (percent): 29.10191007
+  classifications correct (percent): 70.0958762
+  Kappa Statistic (percent): 33.62123199
+  Kappa Temporal Statistic (percent): 38.42055137
+  Kappa M Statistic (percent): 29.04555701
 Model measurements
   model training instances: 79999
 
 Index
   90000
 Votes
-  0: 1.03341767
-  1: 1.96658233
+  0: 0.70422672
+  1: 1.29577328
 Measurements
   classified instances: 89999
-  classifications correct (percent): 70.15633507
-  Kappa Statistic (percent): 33.80226873
-  Kappa Temporal Statistic (percent): 38.51665331
-  Kappa M Statistic (percent): 29.1693038
+  classifications correct (percent): 70.12744586
+  Kappa Statistic (percent): 33.69396701
+  Kappa Temporal Statistic (percent): 38.45713632
+  Kappa M Statistic (percent): 29.1007384
 Model measurements
   model training instances: 89999
 
 Index
   100000
 Votes
-  0: 2.37025918
-  1: 0.62974082
+  0: 1.58003357
+  1: 0.41996643
 Measurements
   classified instances: 99999
-  classifications correct (percent): 70.14870149
-  Kappa Statistic (percent): 33.84591534
-  Kappa Temporal Statistic (percent): 38.50733355
-  Kappa M Statistic (percent): 29.23284813
+  classifications correct (percent): 70.12870129
+  Kappa Statistic (percent): 33.76533125
+  Kappa Temporal Statistic (percent): 38.46613382
+  Kappa M Statistic (percent): 29.18543455
 Model measurements
   model training instances: 99999