It's not listening for changes to the URL so going back through the URL does not change the pages state. This is breaking the point of the back button and URL.

It's not listening for changes to the URL so going back through the URL does not change the pages state. This is breaking the point of the back button and URL. If you click through a long Wiki page you'll see presing back does indeed move you back. Back is broken it just isn't hijacked.