not trying to get another demo or nothing but I would honestly have to see what you have for your settings on vegas
different formats need to be setup differently and now that you have 3 different sources your SD footage, iPhone, and now the 720 something is getting messed up in there
but itunes doesn't have anything to do with it unless you are capturing footage through itunes which I doubt
EDIT: I don't want to clog up this thread anymore with editing lol so I'll just talk to you tomorrow if you are still having trouble with it I'm sure if you get frustrated enough you'll call me
still awesome you got to chill with him