Are you impacting the target at the same height with your broadhead and field tips? The problem isn't with spine, but probably a slight adjustment of the nock set. The arrow you are shooting is correct for draw and weight. It sounds like your nock set is a bit too high. Shoot two fletched arrow at 10 yards and than shoot a bare shaft. The bare shaft should impact just below your fletched arrows. Loosen the nock set just enough to be able to turn it on the serving like a nut on a bolt. Turn it up 1 1/2 turns than lightly secure the set and try the bare shaft again. This should correct the problem. Let us know how you make out