This is because Facebook caches the page, which means it visits the property site and saves a copy of it. Sometimes, if you've made changes to your property site, Facebook still shows the old version of the site.
You can manually force Facebook to update the cache by going here and entering the URL: https://developers.facebook.com/tools/debug
That forces Facebook to update the cache, so it will show the correct info.
It may still take several hours for Facebook to update the cache, so please wait then try submitting the link again on Facebook and it should work.