@Lexx:
You don't keep your legs straight enough in the Back Layout attempt. The 540 isn't a 540, it's a 360.

@BioEx:
You're not using -30.00 gravity. Guess I should add that to the first post.

@TengoMan:
I don't see the double leg in there. You need to be facing your feet when you do it.

@Rigellion:
Fulltwist is a Back Layout with a 360 spin to it.

@Cube12:
Aerial needs to look like a cartwheel but you just end up in the same place where you started the trick.