FOCs are not the same for the broadheads and the field points. They should not hit exactly the same. With a great amount of effort you can get them reasonably close, but why? If your BHs are flying straight and grouping tight, sight in with BHs. For right handed people it is normal to be low left with BHs. Mine is usually 2" low left @ 20 yds amd 4" low left @40 yds.