Facebook Comments not displaying on website

Comments from Facebook aren’t displaying on our website. Here is an example the post on Facebook has 15+ comments yet on our site it display 0, https://vista.today/2016/10/volunteers-build-new-coatesville-playground-6-hours/

Here is the facebook post that clearly links back to the correct url. Here’s the embed code:
<iframe src="https://www.facebook.com/plugins/post.php?href=https%3A%2F%2Fwww.facebook.com%2Fvistatoday%2Fposts%2F1201841669875443&width=500" width="500" height="535" style="border:none;overflow:hidden" scrolling="no" frameborder="0" allowTransparency="true"></iframe>
or directly https://www.facebook.com/vistatoday/posts/1201841669875443

None of the shares or comments are showing on our site. However for this post https://vista.today/2016/10/downingtown-couple-buys-loch-aerie-mansion-aims-transform-wedding-venue/ There are 5 comments on facebook and the website is showing 7.