The problem that Facebook is having with your home page (and likely others) is from the following tags:
<meta property="article:published_time" content="2013-10-30T02:32:26-05:00">
<meta property="article:modified_time" content="-001-11-30T00:00:00-06:00">
<meta property="article:section" content="Strange Music">
Those aren't being inserted by JFBConnect. I'm assuming that's from K2, but I can't be sure and I've never seen those tags from it before.
I'm not seeing those tags on your "Support Us" page either, and that doesn't look to be from K2.. which also helps narrow it down to being a K2 thing.
Can you check the K2 settings and see if there are any settings in the general permissions or the category/item layouts that you've enabled that may be inserting that information? Alternatively, if there's another plugin or module you have that tries to add extra metadata?
I just went through the K2 settings and couldn't find anything that would be doing what I'm seeing, but it's possible I missed something.
I hope that gets you started, but if not, let me know.
Thanks,
Alex