Hey there John! I believe we might need to clarify the authentication structure. First, you have one system administrator account and this is configured within Settings>General Settings>System Administrator. It is not possible to create more than one system administrator account in SmarterStats at this time.
If you're looking to provide a user access to a specific site's statistical data though you can impersonate that site then navigate to Settings>Users and add a new site admin user here. Have a good one John!
Kyle Kerst
IT Coordinator
SmarterTools Inc.
www.smartertools.com