Sighting your bow and tuning your arrow flight are two entirely different things as I have learned from the other shooters on this board.

Begin with a good paper tune to get things close and then sight in at 20 yds. Next, shoot your broadheads. They should be close, but it is highly unusual that they both hit in the same spot. Make small adjustments to get them to come together. It sounds like a lot of work, but is fairly easy.

Definitely print a copy of the Easton tuning guide and follow it through. You will have both of them hitting together in no time.