Hello Michael-I just checked the template file in jrGallery module- the facebook OG metadata is lited there like in your example. Still its not listed in the site metadata in the source code and I am not understanding how its getting from the jrGallery module into the head section in your example?
Only way I could think of is to copy/paste it over into my meta.tpl file- which I just tried..now "some metatag info for facebook shows up but the fields are empty-here is a copy of the new source code after adding it to the meta.tpl file
(Th pic I selected is located at this link)
http://drillingahead.com/drilling-ahead/gallery/14154/nabors-rig-417-blowout
<meta property="og:url" content="" />
<meta property="og:see_also" content="" />
<meta property="og:type" content="website" />
<meta property="og:title" content="Drilling Ahead: " />
<meta property="og:site_name" content="Drilling Ahead" />
<meta property="og:updated_time" content="1432817338" />
Notice the image url is blank-the content which I think should be for description is blank and the title of the image is the site name and not the title of the image on the page...
To my knowledge I have not altered the facebook share template-
Another strange issue related to images is this
if you go to this link you will see every image in the gallery has a title....
http://drillingahead.com/drilling-ahead/gallery/p=4
now click on ANY of these images and view the image as a single full size image and you will see the title has disappeared..
These are the titles that facebook share should be picking up but they are blank on the page and blank on the metadata...