As I said, we have different views.
His 30 yard groups are much smaller than the 15 and a much clearer spine indicator. The first 3 pics where not decipherable for any spine determination in my opinion because all the arrows were scattered. As long as there is no riser contact; If the arrows were too stiff, the bareshafts would always land to the left of the fletched arrows for a right handed shooter, again, in my experience. Your mileage may vary, I'm just telling you how it always works for me.
I'll bow out of this one now...hope you resolve the problem.