I posted a reply to "Kimmok"'s first post in this news thread:
https://morph.zone/modules/news/article.php?storyid=2233&comment_id=8311&order=0#8311

And then I made *a new* post (or so I thought) by typing into the box at the bottom of the comments thread (the "Quick reply" box?). The result was that my first post (the reply to Kimmok) was deleted, or rather "edited" with the second post.