Marsha,
The same thing happened to me in that I heard about the $599/pp deal for the Cat 11 cabins. I requested a quote through DU and got a mail back saying the Cat 11s were sold out, but that I could get the Cat 9 at a much higher rate. I understand these things happen, but what really bugged me about the whole thing is that just 2 days later, I got a mass e-mail from DU saying that they had Cat 11s on special for $599 for the same sailing I had requested a quote for.
At the very least, that should have been taken out of the email so that people didn't think they could still get the same deal.
Julie