That sounds weird to me. A bow shooting higher would mean its is faster if nothing is wrong with the scope. I would not think it is the dial a range since your ten and twenty are still right on. Are you using the same arrows as before. If you were using carbons before and now aluminums that could do that but I would not think that much. The carbons are heavier then all. Not sure what to tell ya. Are you sure it does not look like something is wrong with scope? Also, same B-head as before, same weight?