1. Have you added any chapter points at or near the end of any timelines to assist the audience with skipping from timeline to timeline? Remove them if you have. Encore 2.0 does this automatically for you with a hidden chapter marker at a timeline's end.
2. Do you have any assets that are less than 2 seconds long?
3. Do you have any looping menus less than 1 second long?
4. Do you have any chapter markers spaced less than 2 seconds apart?