I've got a question about my application posting on users' feed or even posting the link to the application/website itself, it pulls an old title/description for some reason.
As in, in the script used (https://www.facebook.com/dialog/feed?name=...&description=...) to post the relevant title and description, even though they are updated on both the App and on my website, somehow the old version is being pulled and posted all over the place. If I put a link to my website where the app logic is, it pulls the old version somehow.
How can this be fixed, if at all?
Facebook cache things. You can try one of the article URL in this debug tool, and see if you still see outdated results.
https://developers.facebook.com/tools/debug/
Typically, using this tool, will break the cache for the link you are testing it with.