What kind of target are you using. I would suggest paying no attention to how the arrows are in the target after they hit. They can shift as they enter the target depending on the medium. You need a very consistant medium to be able to this. Arrows will move a lot in a bag target after they hit it, so don't judge it by that. The best way to know what your arrow was doing at that distance is move the paper, or you so the arrow goes through the paper at that distance.

Paul