Unfortunately, you've found a bug in Facebook's implementation of the Comments module. We didn't notice this exact problem before you pointed it out, but we see it now.
Basically, Facebook recently updated their Comment module. It used to always include the Like button, but the 'new' look no longer has the Like button. When you specify {JFBCComments}, we don't specify the href parameter. For some reason, this still shows the 'old' box.
To fix, for now, you can specify the href parameter as below, which will show the 'new' box without the Like button:
{JFBCComments href=http://www.sourcecoast.com}
We'll investigate this further, and possibly be submitting a bug report to Facebook about this problem. We may also update our logic to automatically add the current URL if none is specified. If you're using the tag in a template or somewhere else that it will be on multiple pages, let us know, and we can probably help you to dynamically create the current URL for each page.
Sorry for the problems, and let us know if the above helps!