What determines which images appear in the Top Posts & Pages widget when using the Image List format? Is it supposed to be the first image in a post? The biggest? The featured image? Does shape or proportion matter? I have one post where I wanted the featured image to show in the widget, but the larger second image shows instead. Most of the time it seems to be the featured image, but often that's the only image in the post anyway. And I have at least one post where no image at all shows even though there are two in the post and one of them is designated as the featured image (I've even tried deleting and re-uploading the image).
The blog I need help with is piedtype.com.