Lord Rattington gained 25 points today to reach level 64. I think you need to look at the log and see what's happening, because it probably isn't the case that your AI just got very much smarter. One thing I noticed was that if I pressed "ready" on my table before my partner joined the table, I ended up - ahem - playing with myself. No other players in the game and not much point to do anything but resign. And it may be that Lord Rattington got the score for that.