What makes you think this? You and I know that you can't place a bet after a game starts, that's not how gambling works. I assumed that was a rule here as well. At the time I was scrambling to board a flight and thought puck drop was at 4:30p, not 4:00p, it was an honest mistake (but I understand you have no reason to believe that, and I have no way to prove that).
That said, the bet was for 2 units IIRC, I'll take a one unit loss if that makes everyone feel better... but it might help to also be more clear about the rules, IMO all bets placed after puck drop should be voided. I can only imagine the backlash had I accepted winnings on an invalid bet. (this is still fake money we're talking about right? haha)