I’m frustrated and confused

My inbox has screwed up.

My inbox has screwed up.

Until 20 minutes ago I had 4 email accounts in T-bird.
2 came into their own individual folders.
The other 2 (my main emails) both would come into the "local Inbox".

Now, for some reason, the 2 main emails have "disappeared", only to be found in the unified inbox.

BUT!! the sent folder, and others, are still where they were, including contents..

(while I have been typing this, 1 email has appeared in the correct Inbox of the Local Folders, but ALL previous emails are still elsewhere

What has happened and how can I solve this please?

I have not changed ANY settings here for about 5 months.... so its not me...
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