Wii sales of the last 4 weeks don't add up correctly (IMHO).

[TWRoO]

Shipment wise we know 13.17 million were shipped by the end of September.... now add 3X 1.8 million and you get 18.57 million, but that doesn't include any extra stock that was still in retail in September (which would be minimal in USA but probably a decent number in Europe/Japan)