From your pics, you look like your getting completely left behind, you have no release, and this is not the typical duck ahead before the jump and fall behind over it because your motion isn't centered with his, you look like you never really get into the two point, but are standing up over the fences. Are you jumping on your own or with an instructor? If you don't have eyes on the ground, I wouldn't suggest jumping, and I mean accurate eyes, intermediate riders only, and possibly exactly mirroring your last instruction, same course, same amount of time devoted to jumping, same jumps, etc. If you are recieving no instruction, really working on releasing will help. I learned to jump when instructed, and it wasn't until much later in life I was allowed to jump unattended. If you are getting instruction, I would say limiting your jumping to just then, will help the process move quicker, rather than slower, allowing yourself not to undo the progress you made with your instructor. I can't say much more without knowing more about your exact scenario.
Troubled TB ~"A thorn by any other name will prick just as deep." @-'--,---