Welcome to the forums.
Mobowhuntr had it right, its your bow.
You may be able to use one sight for all three distances. I can use my top pin for 10, 20, and 30 yards. It shoots a little high at 10 and 20 yards and dead on at 30 yards. When a deer is close , I aim right at the heart. If I'm high, I will still get lungs.
Something to think about. Good luck to you!