Question about Play all and Dual Layer discs

Last month I did a project for a friend where I put all his music videos on to 8 standard layer discs, designed a functional interactive menu system and so on using Encore 1.5 with the update.

Everything worked fine, until today when he reported that if he fast fowards a part during the music video when its in Play ALL mode, it will play til the end of that video then return to the main menu instead of continue on to the next video on the play all playlist. If he leaves it alone during play all it will play all videos then return to the main menu or if he plays one video, it will return to the page menu for that video, which is what it is suppose to do. End functions on each video returns it to its respected page once its done, and of course the play list overwrites this to make sure all videos play and when the final video is complete, return to the main page menu. Any guesses on what I did wrong and how I can fix this?

Second question, now that prices have come down for dual layer printable discs, I was thinking once I fix this glitch, I can redo the discs and tell either Encore or Nero to burn to DL discs with no problems in order to bring the discs down from 8 to 4? It should be that easy correct?

Thanks for the help.