Hi. You probably need to supply more info. How do you send the kite when jumping? What is your speed and edge like? Try really leaning back before take off, this should help with rotating in the air. Start off with smaller jumps and work on your balance and slowly build up to bigger airs.
Also, at first, when you leave the water, keep your legs bended, so you don't get kinetic energy you'd have keeping you legs straight. Then, when you get the thing you'll be able to jump with more style
yep its all about the release from the water. i had this problem too particularily poping off waves.
When you slice out of the ater your leaning to far back and initiating the rotation. try and keep your upper body static and slice out with your legs.... sorry i can picture it in my head but find it hard to rght down what i mean.
When you perform a regular jump as you start to descend you should be pulling on the front hand, directing the kite in front of you.
As well as pulling down on the bar you can also push away or pull towards you to counter act any unwanted body rotation. Although this push or pull is small it is enough to influence your body rotation.