Should Do Not Disturb be cancelling incoming calls? I was just wondering about DND. It was my understanding that DND just silenced notifications (calls, texts, alerts, etc) system wide.

I thought it just ensured that the screen does not light up and not audible notification is played, however it seems from my testing that when enabled DND actually cancels incoming calls, rather than just silencing the incoming call. Is this correct behavior?
The iOS 7 description of Do Not Disturb states(accessible over Settings > Do Not Disturb)


  When Do Not Disturb is enabled calls and alerts that arrive while locked will be silenced, and a moon icon will appear in the status bar.


So DND should not cancel incoming calls.

This seems to be an ongoing problem/bug on the official apple forums.