BuddyPress.org

When the admin account is created for buddypress, the @mention is “ @admin“.

I’m not sure what this means. BP doesn’t create any admin accounts. It uses the same accounts as your WP installation. As long as you have WP 3.0+, you should have had the opportunity to select your admin login name when you signed up.

Can you be more specific about where you are seeing @admin show up incorrectly? In the member header? Or in activity items? Or elsewhere?