Or it could be them not paying attention the second time around. An example of this is in FireRed and LeafGreen. On Route 3, Bug Catcher Colton claims to have seen you in Viridian Forest and when you win, he says that you have beaten him once again. There is no Bug Catcher Colton in Viridian Forest. In Generation I, only Gym Leaders, Elite Four members, and Blue have actual names in battles. Every one else just has their trainer class, making it impossible to tell individual NPC trainers apart. In those games, that Bug Catcher could very well be any of the previous ones. In the remakes, however, it is impossible.
Long story short, maybe they screwed up. Or maybe there are new Frontier Brains. Or a brand new type of multi-facility battle area (I've heard Battle Resort from the demo dumps). Long story short, we don't know until Friday (or sooner depending on the leaker).