I am not sure what is going on but that does not sound like a fitting that is reliable. I think Keith E. Carlson is right about what you need. By adding spacers between the pad and the butt you will move your face back and lower your eye so the gun will shoot lower. It sounds like you need cast on like a lefty to move the pattern to the left. A small amount of bending might make the gun fit well.
Try patterning at 16 yards. Mount it as if you are shooting clays. Don't mount it like you are aiming because you will either push your face down further on the stock or to the side more than if you make a fairly quick mount as if you were shooting game or clays.
Find the center of your pattern. For each inch it is off center, move the stock 1/16". So if it is 4" high move the stock comb down 4/16" (1/4"). Mike Orlen can discuss this with you to clear up any questions I am sure.
