Jason,
Try installing and enabling the Open Graph - K2 plugin that comes with JFBConnect. That will enter better Open Graph tags on your page and may help fix that problem as well. The issue is how we insert the social buttons into the K2 article and is something we're investigating. It started with K2's recent update which adds their own Open Graph tags which don't properly parse out some HTML content like they should.
The other option is to change the display type of the social buttons in the JFBConnect -> Social -> K2 Social Buttons tab. I'm assuming you have it on 'both'. If you use just 'top' or 'bottom', that should also fix it.
Hope that helps get you going, but let us know if you run into any other issues.
Thanks,
Alex