So I am trying to get my bow dialed in and my 20, 30 and 40 pins are hitting good consistently. 50 and 60 pin seem to fall off the face of the earth like a foot low , I am max'd out on my sight trying to get the 60 down low enough. My arrangement of pins is fairly centered in my sight.... What the heck could be going on? Bow is pulling 65 lbs....