Would the trophy taker drop away lowering the arrow to quickly have any adverse effect on the flight of the arrow when I try to shoot broadheads with that setup?
I can' t imagine the arrow is not coming out nock high. Are you getting a high tear or a bare shaft hitting lower than fletched??
I also can see a loss in consistancy, as the flight of the arrow is totally dependant on when the rest drops - a little sooner or a little later and you will have vertical flyers.
have you shortend the pull up cord so that it is pretty tight at full draw - this should give you 2-3 inches of support.
If you really want to test if the rest is droping too soon, add a stout little spring to the cord (on the rest side) and get that rest up with 4-5 inches of draw left. If this solves the problem then it is the rest dropping to soon.
But I don' t think that is your main site problem - It sound like a high anchor, high berger hole, insufficiant site adjustment, combo problem thingy