Try to get a more upright seat...think straight line from shoulder to hip, to heel, basically; in dressage, you want to be pretty much in an upright position at all times, not so far forward.
Your foot seems to have slipped too far forward as well, so it also has swung a bit 'outward' too.
Your leg is too far forward too, which can effect the ability to push your horse to drive from the rear; which he is not really engaged from behind; notice how far his rear leg that's coming foward is from his front foot that will be leaving the ground...it's too far away, which means he isn't driving from behind really well.
If you fix your position, you will be able to help your horse drive foward and into the bit, from his hind end, which will improve both of your marks\scores.
Oh, and beautiful Appy, I might add!