When having multiple redirect URL the specs page is unable to validate the key and the App page shows it as a one URL.
(I tried using a comma ',' and also comma-space ', ' and the result is the same. the Spec adds them together
and not only the Spec page but also the App page, it shows the redirect urls as one big one!
Release : 5.1.2
This is a know limitation and will be fixed in next portal release 5.2.1