Your wear has to do with how you draw the bow not how it is tuned. Try raising the bow and drawing on your target. In other words, aim the bow before you draw, then draw the bow straight back to your anchor points while still holding on the target. If you can't do that you probably are drawing too much weight or have too long of a draw length.

Or like said above, it may just be your release design. I think my loop wears more at the top as well now that I think about it.

Not a dumb question at all by the way.

Paul