FaceBook Posting

I installed the free version of Yoast SEO and for the above post clicked on the Yoast social icon in the left sidebar and entered content in the input fields for “Facebook Title” and “Facebook Description”, and uploaded a “Facebook Image”.

Then I viewed the post, copied that URL and pasted it in a FB post. The Facebook Title showed up but not the Facebook Description. Also there were 5 featured images that appeared instead of just the one I uploaded.

What am I doing wrong please?

The page I need help with: [log in to see the link]