im having a similar trouble this year. i am used to using Eastons Broadhead tuning method. tried it this year, many times. when i get my muzzys hitting where i want them, my FPs are shooting high(my broadheads were shooting lower than my FPs. i started completely from scratch 3x now. i cant figure it out. gave up...flight and grouping is terrific. id love to know what it wrong..but i cant figure it out....they shoot great clear out to 40 and match my pins that were set for my FPs...

if you havent tried broadhead tuning yet, its definently worth a shot. i had no trouble till this time around. normally i can close my eyes, grab an arrow with any of the 4 fixed blade broadheads or the mechanicals i had and it didnt matter...hit where i aimed. not this time around though lol...oh well...flight and grouping is good thats what matters...

if you DO follow the eason guide, make the adjustments REALLY small like Greg said....literally fractions of an inch....