Spine looks fine, according to the chart. I' m betting it' s centershot. I' ve had times in paper tuning with single cam, single track bows where I' ll hit a sweet spot with centershot way off to the right (right handed shooter) and get a perfect hole. But when I sight in at 20, all the other pins hit off to the right.

If I remember correctly, Mathews recommends starting out by setting the centershot somewhere around 13/16" from the sight window.