"The Raised Cap" entry is behaving correctly.
So is "Live Area".
"Returns" is showing a thumbnail image in the excerpt, but the image is not on the page, so where is that image coming from?
Then on this page http://castlecommunications.com/category/style-meister/
All of these excerpts have an image on the page but it is not being displayed in the excerpt.
It might inform the puzzle to know that I discovered a plugin called "Advanced Excerpt" that I have turned off because it was causing duplicate images on the page/post. But all those blank excepts did have the thumbnail displayed.
Please help! Many thanks!