OK. I don't have leather straps on the buckles of any of my monks...are you sure the straps aren't there only for temporary protection of the buckle? If you're not happy with the situation make the return...but I would guess that such a small piece of leather in such a spot will eventually come off with all the friction.
maybe they are indeed for temporary protection? How am i suppossed to know that haha? These little leather thingies are glued up, and look quite sturdy on other straps. Here is a close up: