I'm going to play the "Yeah, but still..." card here and stress that releasing the same product (or what otherwise could've been the same product) under two different names at two different sites is very, very douchey AND uncreative.  If these trends continue in an already bloated, tired marketplace, it is going to undermine whatever buyer confidence is left IMO and something should be done to let everyone know this sort of underhanded behaviour won't be tolerated IMO.