I just purchased a new hoyt x tec. 60-70 lb. The shop I purchased it at did not have my draw length in 60-70lb. They took they cams strings and cables from a 50-60lb bow and put on my 70lb bow. Problem... My bow will only max out at 64 lbs. does anyone know what could have caused this and how to fix it. I have shot it about 100 times. Thanks for any input