You are really limiting the horse's use of it's neck without a release. Your heel has to cone back under your hip, and you should discuss auto releases with your trainer. You should think about relaxing into your lower leg more and stabilize your position so you can use your legs, seat and hand independently without bracing. Shoulders back, elbows in. Posted via Mobile Device
It appears that you ducked a bit to the right in this picture.
The horse has jumped hollow and flatish because he didnt have any freedom in his head and neck. Your hands should be about another 6" forward. Even if you thought he was going to put in another stride, you have to go forward with your horse. It looks like he was right in choosing the spot that he did for take off, which is good, as if he had chipped in, I bet rails would have been down.