If you can point your arrow at a target and draw it stright back without a big bump at the end of your draw cycle, I would say your fine.
However if you start your draw above the tree line, grunt, or fart while drawing your bow, you may need to back her down a little.
I see this all the time, but dont try to tell them they are over bowed, its like your trying to take 2" of pecker away from them.