Different domain mailboxes with same email contents.

I have three email accounts in thunderbird, each using unique domain names. I connect through a ProtonMail Bridge to my Proton account which is also configured with the three domains I'm using. Proton recognizes all three as configured correctly and if I send from any one domains address, all domain addresses receive it. It appears things have gotten corrupted when I was doing lots of configuring and all my email inboxes share the same contents even though Settings->Server Settings->Local Directory is pointing to separate unique directories (the original ones) for each account. Also, the "Drafts, Sent, Archives, Junk, Trash, and Outbox" folders are gone for all three inboxes (but exist for "Local Folders". The only "folder" under each account is "Inbox", and all three accounts (e.g. larry@a.com, curly@b.com, and mo@c.com) all have the same contents where every email from every account is all in the same Inbox. They're all mixed up. I've not a clue what went wrong other than Thunderbird doesn't handle configurations well. I've tried the Inbox->Properties->Repair Folder to no avail. In fact, when I did that, it appears to have downloaded my main accounts inbox into the other inboxes possibly resulting in the mixup of email. Thoughts?