Multisite with buddypress and domain mapping problem

WordPress 3.3.1; multisite and buddypress

Buddypress 1.5.3.1 with BuddyPress Fun Theme 1.5.3.1

Domain Mapping 3.0.7

Buddypress root blog = #2

Everything seems to be working pretty well except that we want to use a different domain for Blog #2. I have the domain pointing and the domain mapping takes you to the correct site, but the registration/fign-up is not linked. Or any of the social media statistics (ie. facebook like/google +1 stats) showing that exist on site when not mapped.