Is it abnormal for someones sights to have to be aligned way left of their arrow rest to hit their target? My son is 12 and consistantly shoots well left of the target. Vertically speaking he is fine and usually hits in the same area to the left. He seems to be staying still through the shot. However, I have to slide his sight all the way over and then some to have him hit his intended target.

When I shoot his bow it goes way to the right of course. I know people see and set up differently but I don't want him to develope bad habits if its something he is doing. Any ideas?