I use jetpack for some things, and I use the WordPress SEO plugin for a lot of things, so when I found out they were doing double open graph tags for facebook in the header, I started looking at fixes..

There are some fixes here on the post at yoast.com, but those fixes didn’t work for me.

The fix that worked was to add this line:

remove_action('wp_head','jetpack_og_tags');

into my functions.php, and voila, only one set of open graph tags on the site..