My understanding from the other articles is that the error was an error in the transmission to the media - the media is not an official authority and has no say in what any official or final vote totals are.
It is still an error and the error is not acceptable. If you want to eliminate unofficial election returns, I am completely on board with that. However, if you are going to do them, you do it right. Forgetting to include an entire city in a reported result, unofficial or not, is just not acceptable.