<font size="2">hmmmmm pie....

</font></p>
<font size="2">I think you've discovered Archer's Paradox II, Shawasha

I think what you need to do is to set the bow up to the best of your ability, put the target 5-10 meters in front of you and then start tuning from there and see what happens. Of course, if there's absolutely no consistency in your shots then you really need to concentrate on that before trying to tune your bow.</font></p>