I dunno what's going on, but you can add me to the list of people having issues with Blogger's comment moderation. AlanDP went through it a little while ago. Maybe he's like the Typhoid Mary of disappearing comments too, 'cause one from him was the first one I had a problem with.
I had a notation on my dashboard saying I had 4 unmoderated comments, but when I clicked on the link it said none were found, and I haven't received e-mail notification for any that I haven't published, to my knowledge. I don't know if that was hanging around from the last four comments I moderated (I don't think so), but rest assured I'm not purposely ignoring anyone.