Geez, you've got a lot going on. While you may have somewhat marginal media on your hands, agree with bpglenn...the media is not your problem here. Express, in complete disc mode, has issues with certain recent releases; certain copy protection gives rise to disc structure problems such as you describe (do a search and you'll find related threads in this forum). Unfortunately, you now are experiencing hardware issues as well. Well, when it rains, it pours.
I noted this hardware failure on another thread you initiated on the newbie forum. Please don't cross post; it's confusing and frustrating for members that are just trying to help out, for you too.
Anyway, if you get your burner working/replaced, try main movie and my bet is that the chapter gitch will not be reproduced.
Let us know, good luck... :iagree: