Hello, I am having the same issue at Hispanicize.com. Neither Wordpress or FB comments are appearing. I have attached both the granted permissions and site url screenshots to help expedite this. Please let me know what else you need to help troubleshoot.
In addition, the plugin is not working properly at BeingLatino.us - although the wordpress comments are working for this site. When we made a test post, the default homepage title is appearing on the fan page and the article title appears in the feed along with the appropriate title... This site is under maintenance mode, so I would need to give you a temp login.