I don't think that's how sharing someone else's post works. If I make a friends-only post, and you share it to your friends, only the intersection of our friends can see it. I agree this is maybe not as clear as it could be on the UI, but I believe that's how it should work. If you find otherwise, would you mind filing a bug at www.facebook.com/whitehat?
How’s that possible? There’re a lot of (thousands?) multi-platform apps for iOS, Android, Blackberry etc. For instance, Angry Birds has versions for “iPhone/iPad/OS X,” “Nokia Devices,” and “Android (Amazon/Google Play)” on their website: http://shop.angrybirds.com/us/games/mobile-games.html
Needless to say, the full list of platforms Angry Birds runs on is (according to Wikipedia) much bigger.
It was the first app launch, and we prominently showed an iPhone and a Nexus side by side with our app. Whoever reviewed our app didn't like that, so we took the Nexus image down.
We probably could have just posted the old design back up after the app got approved, but the company didn't last very long past that.