Two of a new user’s posts were held for moderation.
I approved the second, later one before approving the first, earlier one. (The second one appeared at the top of the screen and I didn’t read the first one until later.)
What I expected - the posts would appear in the topic in the order that they were submitted.
What happened - the two posts appear out of order (ie in the order that they were approved).
I don’t think there’s a way through the UI without doing the split/merge or copy/paste dance, but there is a rake task that could do it if you have server access (and are comfortable performing them). Here’s an example of it, and also how it could be adapted to target a specific topic: