Great balls of fire, what have you done? Unfortunately, I have to admit that you've found a bug. We never tested on the Contacts page (I just recreated the issue on our dev site), but it appears that Joomla actually treats that page as a "Content" page, which then, our plugin decides to go and vomit our Like and Comment code all over.
If you disable it, it should disappear. While not a permanent fix, it should hold you over until we have a fix for the JFBContent plugin. Before you go into a flat spin (alright, done with that), since you say you already disabled it.. I'm assuming you have caching enabled. After you disable the plugin, please clear your cache (Tools->Clean Cache and Tools->Purge Expired Cache in the admin area), and that should prevent the gobbeldy gook from appearing on the page.
Sorry for the trouble, and we've entered a ticket to prevent the Content plugin from appearing on the Contacts page.
If this doesn't help.. well, you know where to find us.