Are you also marking non-junk messages per https://support.mozilla.org/en-US/kb/thunderbird-and-junk-spam-messages#w_tell-thunderbird-what-is-not-junk ?

Are you using whitelisting?

And, please post a screen shot of the junk folder message list before you remove the non-junk messages.

Thank you Mr. Mery. I used this link https://www.makeuseof.com/tag/whitelist-email-addresses-thunderbird/

to put the problem junk emails into pers addr bk, and doublechecked his advice on junk settings for accts (no need to chg anything). I had already moved the falsely junked msgs to inbox -- including YOUR reply, also junked by t-bird on intake. So I can't provide the screenshot today. Will do if prob recurs. I presume your reply will continue to be junked, since I didn't "fix" (?) it as above. I also cannot locate where the "whitelist" settings are. I presume the makeuseof pg was instr. on whitelisting.

Most of the junk mail is (again?) coming in via my hotmail acct, which I set up to appropriately route most emails I get (true junk) via that acct. I don't know if MS provides fine or any tuning for free hotmail, & will check when time.

Also, what is the appropriate link to log in to here? FF is now routing via its link, which appears to be "the future."

Thank you.

whitelist is discussed at https://support.mozilla.org/en-US/kb/thunderbird-and-junk-spam-messages#w_per-account-settings

I marked this as solved. I not only did as the answerer suggested, but noticed that Dev Builds addressed (a similar or same - hard to tell if it was only my ques) the issue, at abt the same, time, which was the overaggressive built-in junk training filter (Moz appears to have "repaired" it?). So I don't know who fixed it, but it's fixed. Thanks.