Could you please explain the tuning process that was done before you started having your problem?
Thanks everybody, went to the range last night. Moved the rest 1 click to the left and now I am right down the middle again.
You may have just negated the tuning process. Did you shoot a few arrows thru paper after you moved your rest to the left?
Because of my anchor I've had to put spacers under my sights on most of my bows to cure the problem you described. It really is a quick and easy fix.