Remove featured image from post page

All of a sudden, my featured image started appearing at the top of the individual post. I would like to get rid of this as it causes repeat images on my post while still having a featured image appear as a thumbnail on my homepage.

Here is a post where the featured image appears as a header, causing the post content to get pushed down: http://fitfulfocus.com/dopey-challenge-training-update/.

Thanks!