Facebook doesn't recognize my pic in post & doesn't display thumbnail

Hello! I recently got a layout change and everything was upgraded on my site (freebieshark.com), including the ShareThis plugin. For some reason, Facebook is not recognizing my images in the posts. Can someone look into this and help me figure out how to get this fixed? I never had this issue before. The only image it recognizes is the header graphic, which has nothing to do with my post. Any help is appreciated!