-k parameter causes duplicate first season of each set

[Omertron]

Original issue 2591 created by Omertron on 2013-02-03T18:00:18.000Z:

What steps will reproduce the problem?

1. rescan with '-k'
   2.
   3.

What is the expected output? What do you see instead?
Each TV Series will have the first season duplicated.

What version/revision of YAMJ are you using? On what operating system?
r3507

What skin are you using?
evZap

What device are you using YAMJ on? Networked Media Tank, PlayonHD, Other?
Win32

Please provide any additional information below.
Tried on a sample collection to see which properties could affect such behaviour. Seems it's just the '-k' option.
Just to be on the safe side here are, what I consider influential, settings that I use:
mjb.forceIndexOverwrite=false
filename.scanner.skip.episodeTitle=false
mjb.singleSeriesPage=true
mjb.recheck.XML=false
mjb.recheck.Unknown=true
From the log with '-k':
[18:41:42 - main ] Found 7 videos in your media library
[18:41:42 - Thread-2] Checking existing video: QQQ [Season 1]
[18:41:42 - Thread-2] XML file found for QQQ S01E01 720p HDTV [eng][eng]
18:41:43 - Thread-2] Finished: QQQ Season 1
[18:41:43 - Thread-2] Checking existing video: QQQ [Season 1]
[18:41:43 - Thread-2] XML file found for QQQ S01E01 720p HDTV [eng][eng]
[18:41:43 - Thread-2] Finished: QQQ Season 1
From the log without '-k':
[18:56:21 - main ] Found 5 videos in your media library
[18:56:22 - Thread-2] Checking existing video: QQQ [Season 1]
[18:56:22 - Thread-2] XML file found for QQQ S01E01 720p HDTV [eng][eng]
[18:56:23 - Thread-2] Finished: QQQ Season 1

If needed can provide full log.