thunderbird even deleted messages from live mail


New Email
I just downloaded thunderbird after having problems with groups in live mail. Had no problem setting up account, but when I clicked to get all messages, thunderbird is retreiving thousands of emails that were long since deleted. How do I stop this? I closed the program twice thinking if I reopened it would stop. There is no way I can sort through who know how many when it finally finished.

I need serious help.