Joke? Who's joking?
But yeah, I've had that happen too (not in AlphaJax, but in similar games). You beat someone and then they come back with a vastly improved vocabulary. Oh well, at least cheaters eventually start thinning out after a while. I can imagine it must be pretty boring to just sit there and do whatever a computer tells you to do.
Also, I meant to comment on something you said earlier:
Did you mean Words With Friends perhaps?
I actually meant Wordfeud. Sorry, too many similarly named games.