First, JFBConnect v6.2.2 was just released. It fixes the problem where tags were always shown, so you can remove the Admin Render Key, if you don't want to use that setting.
As for your issue above, can you let me know:
* Do you see the {SCOpenGraph ..} Easy-Tag on the page, or is it being removed as it should be? If the tag is still showing, it means there's some issue with JFBConnect parsing the tag.
* Is the Like button showing as you expect?
* Can you let me know the URL you're testing this on so that we can take a look at the HTML output and hopefully determine what's going wrong?
Thanks,
Alex