If an answer is converted to a comment and then subsequently undeleted, and then deleted again (without being converted to a comment), the message beneath the post still reads:
If the answer is then undeleted again, and the comment is deleted, and then the answer is deleted again, the message still reads:
This happens if the mod who converted the comment is not the same, or is the same, as the mod performing the subsequent undeleting and deleting. The initial undeleting was performed at least six months after the initial conversion to comment (if that is of any relevance).
Why or how did I discover this? Because there was a ridiculous answer that had unfortunately been converted to a comment, and I wanted the answer both deleted and not to have the converted to a comment by XXX status message, and instead just have the deleted by XXX status message.