Ok a part of me is wondering if they failed to show proof they actually lived there. Here in NC we require proof when registering of living at that address with a utility bill or something with your name and registered address on it.

However inactive people in NC (these include those who had cards sent to their homes to send back to board of elections but didn’t do it so are placed as inactive) they are still able to vote when they show proof of where they live if they bring it with them to vote