3 problems.

1. When I went to edit an existing distribution list in the admin page, I got a member already exists error. At the end, I have to delete the distribution list and redo it again. Is there anyone who faces the same problem?

2. When I search a "." in the distribution list, it returns all the names created in the server. But it includes the aliases as well. Will the person receive two emails if I sent to that list?

3. There must be a way to search other by display name or email address (to put the items in the distribution list. Is there? Can I search other fields? If so, what fields?