OK... Found another "issue". If you select the multiquote on the last post in a thread, it isn't included.

I guess you clicked the big Reply-Button which sets noquote for the last Post?

That's ok. A lot of people do that anyway. Ideally, it would show in the QR box for edit before the post is submitted, but if that's not doable, the other option would work.

Yeah... So what to do? If I use "quote" on the last post, it puts it in front of all the older quotes. :(

Should be doable with AJAX, but I am not yet familiar with this so it might take some time.

For the moment I changed it so that the Postorder will always be correct and that the Big Reply Button also quotes the last Post if it was selected for MQ. I think this might make more sense.
An update will be released soon.

OK, I currently got Support for QR this way:
If Posts are selected for MQ and "Quote Message in Reply" is checked the Quotes will be on Top of the Post (Order depends on User Setting Oldest or Newest First), the Reply is below them.
If "Quote message in reply" is not checked they will not appear in the Post, but they will still be selected for MQ.
Furthermore, the MQ Icon for the quoted Posts does not change after an AJAX Post, only if you reload the Page - i'll try to get them reset too.

Does this behaviour make sense?

Ummmmmmmmm. No? LOL "Quote message in reply".. As in the check on QR?

No, I am talking about the Checkbox below the QR Editor.
Which global setting do you mean?

I changed it. LMAO

I think I see how it works... Oh hell. Make the changes. I'll delete, reload and test. Why not? I've busted just about everything else on my site today.

Yes. Makes sense to me. We can always tweak it as necessary.