What steps to reproduce the bug :
1/ install Fof and use the admin accounts to read your feeds
2/ create an account and add some feeds on it
3/ get back to your admin account and update your feeds :
in the zone where you see the list of feeds that are updating, you'll
see the feeds of the others people. Others users don't see other's
peoples feeds but admin do. They do not appear the admin list of feeds,
only in the view of feeds that are updating.
4/(optional) delete the account of your friend because you do not like
him any more for causing that trouble => his feeds still appears.
I'm running latest version of Fof, if what i say is not very clear or if
you needs other details, just tell me.
regards.