Twitter says I have no trackers but sent me a tracker message

So this is sort of a weird story, but...

Right when tracking launched, I set up a tracker ("track Amazon") to try it. I usually use twitter via web and didn't realize that tracking didn't work on the web, so it's never been useful to me.

Then I turned on SMS last night and received a message that was clearly from the track Amazon command (message from someone I don't know). So I sent "track off" and got back "You aren't tracking anything."

So I have some loose tracker in the twitterwebs somewhere, and I don't see how to get rid of it.

(P.S. Bring the FAQ back!)