"NO!!!"
You can usually adjust things a little to get both FP's and BH's hitting near same Point of Impact.... Read this thread from Archerytalk, it's first page is well worth your time.....
http://www.archerytalk.com/vb/showthread.php?t=539460.
In very small increments, move the rest towards where you want the BH's to go until you are at same POI. Also BH's will "exaggerate" any form flaws, so shooting BH's usually results in a little larger variation in group size.