but it doesn't get my birthday, website nor college name and graduation year
Those are all extended permissions that would need to be requested of the user. You need to go through the Review Process in the Facebook Application to request the proper permissions. Facebook then has to allow your application to request those permissions from everyday normal users.
When you're the admin of the app, you can request whatever permissions you want from yourself without approval, which is why you likely didn't have to go through this process before.
I hope that helps explain, but if you need anything else, just let me know.
Thanks,
Alex