I looked into this earlier, but don't have any great answers yet. There's something in your template that is making the main section of content stay above the social features in the module area. I'm not sure what it is. You may need to contact your template provider for assistance in understanding what's happening.
The typical fix for this is to add a z-index to the module position, but that is still not making the popup appear over the top of the rest of the content.
Alex