Unrelated Facebook comments appearing in the "Comments" section of my WordPress admin pane

In my WordPress admin panel, there are comments imported from Facebook which are unrelated to the post that they appear for.

The comments don't seem to actually show up on my site, so that's good -- but it's really disconcerting to see comments out-of-place, pulled out of Facebook and appearing in my Comment Moderation Panel.

Worse, the comments can't be deleted from WordPress. It gives me an error when I try to Trash them:

"You do not have permission to do that."

What's wrong?