A new user on Premoderation posted the same message twice.
Via the Premod. function I tried to reject one message, and accept the other, and remove the user from Premoderation.

I ended up with a thread with the correct name, but no posts at all.
And the post I had tried to accept was still in Premoderation, but could no longer be accepted.

I had to make a dummy reply to the 'empty' thread, to then delete the thread.
And then reject the remaining post in Premoderation, and get the user to re-post the message.

Steve

Thanks for your report.

Let me clarify this a bit:

1. Could you make and submit a screenshot of what do you have under Administrative panel -> Premoderation settings? Specifically, what do you have under «Premoderation Mode» and «Appearance of Approved Content» options?

2. Under the message, do you suppose that a new user posted the same topic twice, right? Or did s/he make a similar post in the existing topic?

3. Do you suppose the truly new user/account which doesn't have any other messages posted?

For question 2, I can't remember...
and for 3, yes it was a new user with no previous account or posts.

Unfortunately, I wasn't able to reproduce this issue, so it needs more information for investigation. I couldn't fix the bug until I'm able to repeat it.

If you experience it next time, please watch all the conditions carefully. Under Premoderation panel, premoderated Topics and Posts are stored under different sections, so it should be easy to keep this in mind in advance.

I've tried both cases on miniBB demo, i.e. when a user makes similar two topics with the similar title and the similar message; and when a user posts the same message to a couple of existing topics. Both messages «arrived» to the Premoderation panel's different sections, and I've repeated the steps you've mentioned, i.e. approved one topic/message and rejected the other and removed the user from panel. This all worked like it should.

You also have to watch what you're doing carefully. It's quite possible you've just occasionally rejected both messages, in this case they will be both gone, for sure.