I think it would be a good idea that when emails arrive in Junk when they shouldn't - if i mark them "As Not Junk" then they would arrive in my Inbox - and not return smartly to the Junk box no matter how many times I try.
They also eject themselves back into Junk when I manually move them to the inbox.
Or if I select the "Move to Inbox again" option - although this time a message popped up saying that the mail server had responded with "EXPUNGE"!!!
It's only solved by forwarding them usually with a different subject.