I was randomly clicking around, and for absolutely no reason, clicked on Blogger's spam comment folder. And in that folder, I found a bunch of spam comments -- and several real comments from wmtc readers! There were comments from M@, James, deang, and Amy. This was quite a surprise.
I put all the comments through. They are all on very old threads. Strangely, I have not received them by email, as I normally do. Weird.
The lost comments have now been recovered. We can all breathe a sigh of relief.