What you're describing is NOT planing. Planing is where the arrow starts out straight and then veers off course, usually at random. Your arrows are obviously shooting straight and consistent to the same point of impact. The point of impact is just different from field points to broadheads. All you gotta do is sight in the broadheads.

Some guys would say you need to raise your nockset and maybe tweak the rest to the right to get both points of impact together. I don't necessarily agree with that. A bow that's properly tuned with broadheads doesn't always group them together with field points. A bow that's properly tuned with field points doesn't always group them together with broadheads.