I am shooting 100grn thunderheads and 100grn field tips with my bow maxed out on poundage.

I have been trying to get my bow to shoot broadheads and fp in the same place. I have been seeing my broadheads left of my fp about 8" when my bow is shooting thru paper perfect. I moved my rest to towards the riser and it got better but it is too close and does not leave enough room for my fletching to clear. I twisted my arrows and it got better but is still not exact. what am I doing wrong here?