Ok, so i have tuned my bow, eplaced strings and all of that good stuff, but my 20 yard pin seems to be very low. i hae 5 pins tottal and the are all bunched up at the bottom, got like an inch and a half space between the top of my sight and my first pin, and then i have the sight it self lowerd in the brachet as far as it will go. what is going on with this D@#$ thing???? Any help?