my test site isn't mapping correctly

I am totally new to WP, Multisites, etc, and I'm trying to set up a test domain to point to my new domain. I think I have MU installed correctly and the associated plugins, etc. But if I visit the site from the wp-admin, it still points to the subdomain (multiplegods.midnightmature.com) . If I visit the site directly (multiplegods.com) it points to some wacky placeholder page?