Hi there COH!
I guess I'll just get right to the point! I'm having a tough time correcting my position. These following pictures speak louder than my words.
Yes, this position can cause you problems, mostly on XC. The reason you are "laying down" so much is that you are still using a crest release that encourages you to use the horse's neck as a prop. On XC, that kind of release makes it very hard to follow the horse's mouth and often causes a sharp jab. Also, you lose the ability to influence your horse's speed, balance and direction of travel while your hands are propped on the neck. Since your upper body is so far forward, and toppling even further forward, your tight leg muscles are pulling your lower leg back, further unbalancing your upper body.
Again, your unyielding hand has restricted the horse's mouth. Your overall posture is better, even if too low. You are flowing well with the horse's forward motion. If you were to lower your hands onto the sides of the horse's neck, you would have a more automatic release.
Here you are laying on the horses neck, totally using it as a prop to balance your upper body. Your lower leg has slipped way back, further unbalancing you.
So as you can see, I REALLY get down there.. Like a hunter. Not ducking luckily, but still. I used to do hunter/jumper for a long time.. at least 5 years, and well.. How can I fix this and keep my chest up higher?
Is there anything wrong with getting all low like that? Haha I don't know what to call it really..
Thanks for any help!