My except thumbnails show a different image than what is in the post.

A while ago I moved from blogger to wordpress. Everything was good. The images were still housed on blogger, so I spent a couple of days uploading the image to wordpress and updating the posts.

I cleared the site cache (and my personal cache) but some of the post excepts show different thumbnails than what is in the post.

Here is an example
http://www.iamhrsinclair. com/category/a-writers-guide-to/color/

The top post is title “Final Notes on Color”. The image in the actual post is a pie chart but on the category expects pages it is an image of apple walnut bread.

What do I need to do to correct this? Any ideas?