Did you powder test for contact with the prongs?

I just set up a brand new LB1 Newberry hybrid cam without shooting it through paper once and it shoots broadheads in the same groupss as field tips.

I always set everything by eye than test for contact first. Once I know that nothing is hitting where it isn't supposed to, I move on.

I take a level and tape a piece of tape perfectly level across my target butt. I shoot arrows at this line of tape from 10 to 15 yards and adjust nock point until I get the best group of arrows to the line. You shouldn't have to move the nock point more than 1/8" either way from level.

For the centershot. I sight in on a 3/4" flourescent dot at 10 yrds. Then using the same pin I shoot a group of arrows at 30 yrds (make sure your target butt is tall enough). Then using a plumb bob I make sure that the group is perfectly plumb below the 10 yard dot. If the group is to the right of plumb I move the rest left....etc.

I then shoot a broadhead group and field tip group to check how well I've done. On 50% of the bows I have done I have been totally satisfied. If not I use Easton's tuning guide adjust the broadheads to the field tips.

This whole process usually takes less than an hour. After that I shoot and don't mess with a thing. Accept the fact that a BUNCH of bad arrow flight is the shooter's fault, not the setup's.