Hem... No, no... Thanks for the credits, but I think there should be something else in the chain which is filtering out the last chapter.
Possibly it is the analysis and the conversions of AVS2DVD. Please get a look at the input chapter files provided to BM to confirm...
About BM I was saying the opposite of your (kind) understanding infact: as far as I can say, BM is NOT checking the duration of the video, so it is not removing the last chapter. If you look at the .mxp (output) file produced by BM, you should be able to see the presence of a scene at the time 7:30.
Cheers,