you did not mention which direction the deer was traveling.if the buck is going uphill ,i would believe he is bedding on that shelf.if the rubs are coming back the opposite direction,that would confirm he was going up to bed and making his way back down.if the rubs are going in the same general direction,it could be two bucks.good luck and keep in mind that setting up on him anywhere below will give your scent away in the am.