Oliver/FRONTN <<< if that's the actual file name, you need to get rid of the /. Use a dash instead:
oliver-front-n.jpg (and stick to all lowercase rather than mixing cases).
If the browser's confused by Oliver/FRONTN, it might be offering up the other photo because frontn.jpg is the closest image name that makes sense to it.
From within VSD, I would delete anything that's not working, check the image names in your files (not VSD's file folder), change any that aren't proper (spaces, mixed cases, symbols...) and then re-insert them. You can also go to Edit>Remove Files in VSD and get rid of problem images so there won't be any confusion on the server.
Try re-publishing after that and see if everything's in order.