Wisconsin is not an anomaly. Check out the voters added in all States! Millions of votes added on 11/02/20 @ 00:33.
https://web.archive.org/web/20201102003313if_/https://worldpopulationreview.com/state-rankings/number-of-registered-voters-by-state
https://worldpopulationreview.com/state-rankings/number-of-registered-voters-by-state