Those look pretty much fine.
So, pick two products, one whose image appears as you expect it to, and one which doesn't.
What's the image path showing in your admin edit screen?
What's the actual path to the image according to your FTP server?
Then figure out the actual real URL to directly show the image ... such as
www.example.com/images/fred.jpg ... for both, and post both of those here. I'm gonna click on that link, and if the link doesn't bring up an image, then that's something you'll need to fix before we go further, by uploading it correctly via FTP.