Read the disclaimer on the mozbackup site. http://mozbackup.jasnapaka.com

disclaimer???? but im not blaming them . just trying understand whats going on , are they retaining my info on their site maybe any ideas thanx

What site. Both Thunderbird and Mozbackup are software running on your computer. When you ran Mozbackup you decided where to save the backup file.

my mistake, anyway how could old email addresses survive a format

Loading a backup does not "find" anything. It loads what you saved to the backup file.

ok i give up on this one...thanks. are there any free ware good backup programs around for mozilla?

You do not need a program. Just backup your profile. https://support.mozilla.org/en-US/kb/profiles-where-thunderbird-stores-user-data

thats great, thanks very much