Your crotch should not be over the front of the saddle when you two-point. If it is, then you have done too much of a two point.
The best way for me to do it, as I've had a problem with this too, is, as George Morris suggested, right before the jump, squeeze with your legs. As your horse lifts, move your hands. The horse's jump should lift you out of the saddle without you having to do anything. If you have to do something, fold slightly at the hips.
I also like watching people jump and playing that scene in my head over and over again. I feel like my jump position has gotten a lot better, but I will have to wait and see when I get a video of it.
Best of luck to you!