I had this happen to me as well.... on a Friday I saw the 5th game of my series "Pending" so I kept flipping back to the site to see if I could win the last game of the series (I think the series was tied 2-2 or I was up 3-1). After two-three hours of checking back, I noticed it was still pending.

In fact - it was pending the rest of the weekend, and the robot played the game. I still won the game, but I did send a note to Mike stating that this was suspicious.

It's just one of those things... and there are other ways to "cheat"