Missing chapter after backup

[Replicatorz]

Hey folks,
Any ideas why some of the movies I backupn turn out to start about 15 minutes into the movie.
I use Smart ripper 2.41 and then DVD2one for compression, finally I use Prassi for the burn.

I notice that the info file generated after using smart ripper shows that chapter 1 has a 0 next to it and all the rest have numbers signifing something.

let me know.

Cheers