I Like'd the article you mentioned, and it came through just fine for me. The image is attached below:
One thing to note is that another extension is adding duplicate Open Graph tags at the top of the page. The tags look correct, but it's possible those extra tags are confusing Facebook. You may want determine what other extension is adding the meta og:title, etc tags in the HTML and try disabling them if you want JFBConnect to manage your Open Graph tags.
Hope that helps,
Alex