Umm same thing happened to me cause i had originally learned them stiff legged like double nose grab on the tramp. now i just do misty double nose. but what i found help full is jump and spin 90 trying to get you body parallel with the tramp (looking at it) then grab mute and pull up and spin to five it make a perfect cork five. It works for seven too. For cork 9 its basically spin to 90 drop your trailing shoulder and spin as fast as you can and just come out at 9.
oh and get a pro name! hahahaha! you better be signed up for the airbag quick cos its limited places (you do it online, not sure how, collins sorted it for me, ask him, he's online)
if you are looking to cork, all you have to do is throw your right or left shoulder down and towards the opposite side. and do not pussy out that is the key.