Very odd this, noticed it happening about July August time, i can select them from the inbox , delete them, they get moved to deleted,i empty deleted, but they re-appear in all-mail, now called archives. It sort of downloads the message ive deleted again, never used to do it. They are gone when i log into the web gmail though. Tried fresh installs of thunderbird, tried old versions, deleted every hidden thunderbird folder, any idea why its happening? Thanks