Jerry....Your timing marks can' t take into account the amount of high wrist or low wrist pressure you put on your grip. Go with the creep tune, even if your marks are a little off. If it isn' t a creep problem then it probably is a nock height problem. Move it either up or down (only the height of one thread of your serving) and check results. If it is worse go the other way. If it is a little less vertical, keep going till you get the tightest possible for you.