I looked at your URL for
that article
on the
Facebook Sharing Debugger
. Just looking at it initially, the last scrape was 2 hours ago and the 404 title was on the preview (as you're seeing in your screenshot). However, I then re-scraped the page and the preview was updated to a correct title and description.
This shows that the Open Graph tags are correctly set on the page now by JFBConnect. I believe the problem is probably either of the following two - At the time you shared the article either a) Facebook couldn't connect to your site b) the article was not yet published / public so Facebook couldn't retrieve the correct tags.
-Melissa