This is kinda like asking for advice about women...No way in heck can someone on this end of the line tell you...
I do know this, Thunderheads and Muzzys shoot to the same point as my field points out of my bow and I shoot a Biscuit and fingers...You may think your setup is tuned and all that but I've shot these things for 40 years and the equipment now is far superior to what we were shooting in the 60s and 70s...Any properly matched bow and arrows can be fine tuned to shoot to the same point as field points...
You need professional help...Ask around about a good bow shop in your area...It may cost a few bucks but if the right man looks at your setup he can fix it...