I have seen this occurring on several hoyt bows with cam 1/2, even with stock strings. The end loop touches (barely) the inside of the limb on the draw, even with the cams aligned perfectly and no lean or limb twist. It passes quite close and the only thing to do is uses extremely small end loop serving or not serve the end loops. Usually the rub is barely touching and will not affect the shooting of the bow and will bot damage the end loop serving to any real extent.