Fast forward and scene selection problem

DVD FAb Express issue:

I am seeing problems with some DVD copies were they appear to copy without a problem and will also play with any problems. However, I have been noticing on some DVDs the fast forward and scene selection will reset the movie back to the beginning.

I have the latest DVD Fab Express and I am using two Pioneer 110D DVD burners with latest firmware on a dedicated PC just for copying DVDs.

Any thoughts ? How can I fix this issue on the ones I already have done?