Pasting Links of Posts on Facebook Causes Strange Formatting

I have used your template for a client’s site and she absolutely loves it. She did notice recently that when she copies a link from her site to post on Facebook, when she pastes the URL into a new post on Facebook, it renders an image, article date, article title, and a snippet of the post. In her case, when she pastes a link, Facebook renders the content, however, it duplicates the post date, formats the post text improperly, etc. I have viewed other examples from other WordPress blogs on Facebook and they do not have these issues. Is there anything I can do to correct the formatting? I have been reading a ton, but so far, no solution. Anything you can offer is appreciated.