One thing that everyone has failed to mention is that wrist torque causes a right tear (left impact). You'll see it more in a broadhead than with a field point. If your form is correct you could simply try moving your rest in slight increments that would adjust the broadhead group toward the field point group. The two groups should move closer together and arrow flight with the broadheads should improve. Once the two groups are nearly the same (you may not get them exact) you can fine tune the sight again.