When receiving new msg's in Thunderbird they download into both my INBOX...AND...the 'IMPORTANT' folder (sub-folder of the 'Gmail' folder). Also: quite often (nearly always) when I check my email for new msg's, I'll find that several (not necessarily all) of my SENT mailings are also showing in the 'IMPORTANT' folder.

If I delete msg's from the IMPORTANT folder, they simultaneously delete from my INBOX...or SENT mail. As a result, I must always begin...when checking my new mail...by going to the IMPORTANT folder, selecting all the 'SENT' mails, dragging them as a group to the 'SENT mail' icon and then selecting all the NEW msg's and dragging them as a group to the 'INBOX' icon. It's a real nuisance. Thanks in advance for any corrective advise. NJR