DVD goes back to main menu during video

I don't really understand why this is happening. I am creating a bluray disc with 6 half hour programs on it. It has a simple menu with animated thumbnails of the videos. On program 6, when you watch it, it jumps back to the main menu in the middle of the program. I first noticed that it was happening right around the point of my first chapter. I took that chapter off the timeline. When I burned a new disc and played it again, it did the same thing but at the next chapter. I went back into the project timeline and looked at those chapters and they DO NOT have an end action set which means the file should have continued playing. For some reason, it seems encore is setting a "go back to main menu" end action at those chapter points.

Any ideas?

Joshua Weiss