I have a martin cheetah bow. It was shooting dead on until yesterday. Now it seems that my string is twisting every time i take a shot. I am using a tru-nok loop and after every shot the loop is twisted all the way to the left. I can twist it back to the middle and it will stay until i take another shot. Now all of my shots are shooting about 4 inches to the left. Does anyone know what the problem is and can i fix it without buying a new string? Thanks alot!