We have read your message. We try to help you.

Did you used or changed from a system to a new or another system? Did you had recently more updates for software on the same system?

Try to use the link below to rebuild your database. https://support.mozilla.org/en-US/kb/rebuilding-global-database If that is nesssary.

Deleting the msf.file to rebuild maps.

Make sure Mozilla Thunderbird is not running.

Open your Mozilla Thunderbird profile directory on your computer and select the desired account's data folder.

Locate the .msf files that correspond to the folders you want to rebuild and move them to the trash.

Contact me after trying.

Greetings Firefox volunteer.

It's a new install, so there's nothing to rebuild.

Hello there again. Just replace the inbox map? Are there two same profile inbox maps at the moment? With the same profile inbox mails? Check if you have that issue of having two different Thunderbird accounts?

If you have two separate accounts in Thunderbird for the same e-mail address. Right-click the second account in the normal folder view of Thunderbird and choose Settings.

In the Account Settings window that comes up, click the Account Actions button on the bottom left and choose Remove account. Click OK on the window.

You can try to startup in safe modus , to see if it’s still there. You can try the writed above.

If not , can you replace this map? Please send me a picture of it?

Greetings Firefox volunteer.

Sorry for the late reply, I've been trying different clients to see which one will behave as I want. Anyway, back to Thunderbird, please see the attached screenshot. There is a an Inbox at the top which if I'm not mistaken is my Global Local Folders Inbox, so that's ok. Next under Sent there is also an inbox Local Folders, which is a bit confusing. Not sure why it's there or what it does. Finally at the bottom there is another Local Folders with a bunch of custom folders that I created. Ideally these should be in the In the Global Inbox Folder at the top. Hope all that makes sense. Bottomline is I want all my mail in the one folder Global Local Inbox and or its subfolders.

OK I think I figured it out. I had the folders View set to Unified; when I set it to All it sorted itself out. See screenshot. This seems to be what I was after.