I guess they'd get combined, then? I'll go add it to the rulings section...
Edit: Oh wait. You mean not "What if Haley's uncle Geoff and Miron are actually the same person"; you mean "What if the character we know as Geoff is Miron in disguise, and Haley's real uncle Geoff is elsewhere". That's trickier. I think I would still count bets as Geoff as bets on Miron in that case; it seems reasonable to interpret bets on "Geoff" as bets on "the character we know as Geoff" rather than "whichever character happens to be named Geoff". I mean, unless the bet had been placed before we ever met Geoff on-panel, but the thread has not been running that long...