I'm having similar problems. I've gone to my User page and added both my Twitter accounts, but am unable to connect to anything but my personal Facebook account. When I check the box "Connect with Pages support" nothing happens. If I Save Settings the box then shows up unchecked. Also, in the Social settings page it shows no accounts, but when I post a blog there's a new box at the top called Social Broadcasting that has three accounts showing: 2 Twitter, 1 Facebook.
Also, there's a Social Comments box underneath my blog post box, which has Add Tweet by URL (which I'm not sure what to do with that) and a Find Social Comments button, which I'm assuming will bring in any comments made to my blog posts on Twitter and Facebook (there a log there, but my site is so new I don't have any followers to speak of).
I need to get my Facebook business page connected to my site. This seems like the perfect plugin, but so far the most important link is not working.
What do I need to do to make it work? I'm waiting to do my big launch until this is working correctly.