Most single cam bows are known for this, especially Bear's. I have a Bear Instinct and my serving is seperated where it runs around the cam. When your cable runs around the cam during the draw, the angle on the cam is too sharp and it's causing the serving to stretch. A few of my buddies have the original Truth bow and they both took a dremel to the spot on the cam where it's happening and it has been fine since. Personally I'm going with a new string and Halo serving and problem should be fixed. I wouldn't worry about it, but don't let it chew on your string. Aftermarket strings will do the trick for you, but for now you could just wax your string good and should slow down the process of the cam eating your serving.