The system doesn't use the full url for listings, it uses "display_url". Display url is either the medium sized image (if exists) or the thumb or the full image (in that order).
If you are seeing an small image is because display url is that small. No idea why is that small because your input is poor: I don't know your website URL, config values or anything else. You should always throw me everything because I can't guess based on just two screen captures.
If you want concrete answers then provide more context. If you don't want to share the URL then you should have opened the ticket using the actual support form, here: https://chevereto.com/panel/support
If you don't want to let me know the website url or provide server access credentials, then I'm sorry but I can't help you.