You're doing them perfectly. Just keep practicing and get more confortable. I bet if your threw it on skis this year you would come pretty close to landing it first try.
I really want to stomp cork 7 this year. when i watch this it looks so different from how im setting it on the trampoline ive been setting the back flip part really hard but this dude is like just looking to the side is that just cause of the angle of the jump? http://www.youtube.com/watch?NR=1&v=kYytUespFBs&feature=endscreen