Why don't I see any of my images? The posts were created.
More than likely the installed theme does not support featured images (post thumbnails). If this is the case, images are assigned to posts in the background, but there is no interface to display or edit them.
A warning will appear on your Automatic Featured Image Posts settings screen if it is detected that featured images are not enabled.
Can you put the images in post content instead of setting them as a featured image?