GraphEdit Mpeg-2 Splitter filter not showing all audio tracks

I'm using GraphEdit for the first time and it seems pretty powerful for stripping audio out of VOB files. I followed these instructions: http://nickyguides.digital-digest.com/audio-extract.htm and everything worked fine except the Mpeg-2 Splitter did not show all the audio tracks that are on that file. I used DVD Decrypter to decode the VOB and if i open it in a VLC player, i can switch between the different audio tracks. If anyone can help me to understand why i can't see the other audio tracks or guide me to a program that will strip out a track i specify, i would greatly appreciate it. thanks.

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