After removing the Facebook plugin, the comment box is removed while logged in as WP Admin.
Upon logging out of WP, the comment box appears again!!
Chrome inspector shows the widget is inserting code, but the plugin doesn't exist anymore in the /admin-content/plugins folder.
Any idea why?
So I disabled the AddThis Widget, re-enabled it, and the facebook comment box magically disappeared!
Somehow this other plugin was interfering with the FB comment. Should have went with the default method of solving issues by disabling all plugins, could have saved hours of searching for code! Just heads up for anyone who might face the same problem.