Deleted Internet Address from Group, but address still works

I recently removed an Internet Address from a group, however I can still send mail to the Internet Address and the group members receive the message. What am I missing here?

Subject: Suggestions

Rep conflict? cut and paste document back into address book.

Cached ? Run updall on names.nsf

Replication? You are trying from a different server that did not get the change yet

Group in local address book?