Well the way I see it. If he's hitting where he's aiming and the arrows are like that it is more than likely deflection or torqueing the bow.I get these results some when I torque the bow and my bow is tuned perfectly. Center shot dead on, arrows spined right, paper tuned, nock set level and everything. If his bow was out of tune he would not be hitting that close together I wouldn't think. Maybe you are shooting with bow hand open and relaxed (the right way) and then you are grabbing the bow when you set off the release?