Metadata from Blog 5 "Meta and Social" section not being used by Facebook

I've add metadata to my blog posts, but when I share the post on Facebook by copying in the blog post URL it isn't populating the title, image, and description fields as I'd expected. For example, I have the following in my post:

    <meta property="og:site_name" content="MCHT" />
    <meta property="og:url" content="https://www.mcht.org/mchtnews/post.php?s=2015-11-18-record-crop-at-erickson-fields" />
    <meta property="og:title" content="Record Crop at Erickson Fields" />
    <meta property="og:description" content="In 2015, MCHT’s Teen Agricultural Crew (TAg Crew) set a new production record at our Erickson Fields Preserve in Rockport, shattering last year’s total with a 76% increase. Thanks to the bounty, the crew distributed more than 20,000 pounds of fresh vegetables throughout the community!" />
    <meta property="og:image" content="https://www.mcht.org/perch/resources/ericksonharvestfbcover-w1200.jpg" />

I would expect the resulting FB post to use the og;title, og:description, and og:image to populate a post, but it seems to be using the meta name tags and the first image in the post instead.

Is this expected behavior?