About eleven hours ago, this question received two near-identical answers, from two separate unregistered accounts, that were quite blatant spam. Both were apparently converted to comments by a diamond moderator, and while one has since been deleted, the other is still visible on the linked question as of the time of writing.
As far as I can tell, these shouldn't be comments. They're completely irrelevant to the question, and should have been deleted as spam. I've flagged the surviving comment as no longer needed, but first I'd like to know: why were these answers converted to comments in the first place? And if one was then deleted, why wasn't the other one?