I used to wrap cars for a living. You aren't supposed to stretch it - you use heat to get it to conform to curves, etc. and only stretch small areas for super tight curves, say like tucking around behind the bumper and such, and even then you only do it if you absolutely have to.
The vinyl seats appear to not have enough adhesive.
They replaced the door mechanics on Silver, I believe...it was discussed earlier in the thread. Not the doors themselves, but the mechanics that open and close them. Sorry, but I can't remember what else was mentioned.