I agree with everyone so far, especially DeltaBetaBaby. Going to SK's pref won't hurt your chances of getting a snap bid from AXO.
Don't worry about what you are supposed to say. They all will know that there was some kind of mix up. Just have a normal conversation. Catch up on all the questions you would have liked to have answered the first and second rounds.
Good Luck!!
By the way, did you find out yet what the mix up was?