C.R.
Well, here is my suggestion... My daughter is the same, moves all over the place. I tied all the ties and pushed the bumpers half way down the sides of the matteress. She doesn't pull then up or climb out ( her crib I even leave the side half way down, she doesn't have any clue she can climb out) and I no longer hear her little head hit the back or sides of the crib. Good luck!