Don't know. Last I read they decided to proceed with eleven because if they put an alternate on the jury they would have to start deliberations over. I may not be completely up to speed but I think it's the magnificent 11 now.
Also my understanding ther are 11 jurors now, still with two alternates -- in case anything else happens. They would have had to begin deliberations over, that was the argument for going with the 11. The real reason was one of the two alternates was obviously hostile to the defense and receptive to the prosecution by her body language. Probably "Jury 101" on the part of the defense, nothing more.