Home page text displays instead of post excerpt?

I’m trying to share a blog post via Facebook on one of our clients sites but the text that is shared is coming from the home page of the site and not the excerpt or blog post itself.

The site url is healingartsreport.com.

If you share the home page it appears to work perfectly, but when you try to share an individual blog post via Facebook, etc. you’ll see that the text displayed to share actually comes from the home page and not the post.

Is there a fix for this? Thanks!

http://wordpress.org/extend/plugins/tilt-social-share-widget/