@spikey_richie Would you not have deleted the answers if rep was not reclaimed? (You can also undelete your answers.) Sometimes, a downvoted answer can be useful for the community if it puts forward a popular, but incorrect, view.

Another year on and it's over 42,000 unanswered questions. 10K a year!

I'm sure I've seen this sort of thing happen when moderators or trusted users hit the review queue.

I can't see how the same question would even be on-topic for multiple Stack Exchange sites?

Ha, yes! I didn't know there was a "show removed posts" option - I hadn't scrolled that far down the page!