BP-Social isn't working correctly with Buddypress 1.5. Since updating Buddypress and the BP-Social theme you'll notice that instead of printing 'Welcome back, Admin' it now prints 'Welcome back, http://uknexttopmodel.com/members/admin/'. This issue is down the theme, I say this with absolute certainty because I was having the same problem with your BP-Studio theme until I updated it. It seemed to work properly after the update. Can you fix this theme please?