Don't worry about it though. The story is now Interzone's and this won't be a problem. I was just a little surprised when I read the news on your blog, because I'd assumed you'd seen this announcement already, since I hadn't heard from you or your co-writer I just assumed you were part of the group that was waiting.
But again, it's not a big deal, so don't worry about it. Congrats again on the sale.