On my comment on an answer to this question, I received a reply yesterday which apparently indicated that the responder didn't understand that the comment was intended to be humorous.
So I replied, with a comment to the effect: "That's the joke".
I later received a reply to my comment, and on viewing it, realised that my response had been deleted.
So I replied, noting that my earlier comment had been deleted.
Now I find that my subsequent reply has been deleted, too (as has the responder's second response - but not his first).
What's going on?