We are after our residents to update (change) their address when they purchase another unit and move. When an administrator uses the edit (this was through the New Portal Member Accounts) to change an address a new address is added as a billing address . I then have to change the old address so that I can change the new address so I can delete the old address.. If a member changes their own account address from the home page> account settings, everything works as it should but you should default the check boxes on for the preferred mailing & billing if they only have one address.