I agree, Ont-ice - I have noticed this happening at least half a dozen times now in Quizzes & Puzzles - answers mysteriously disappearing, then the questions being answered all over again. This needed to be brought to AB's notice so I am glad you have done so.
Thank you for the back-up Town Crier. It was a fluke that I even noticed it, but I know for sure that it has happened in the past - not particularly to me. I won't hold my breath waiting for an answer to my query.
Have you also queried this?
O-ice