They improperly allowed early voting for some people after the time stated.
Via Daily Caller:
The Arizona Republican Party will conduct an independent audit of the Maricopa County Recorder’s Office after three statewide Republican candidates who initially led on election night saw their races swing the other way as outstanding ballots were counted.
Despite leading on election night and for some time afterward, GOP Rep. Martha McSally ultimately lost her Senate campaign to Democratic Rep. Kyrsten Sinema. The neck-and-neck race took almost a week to call. The former Air Force pilot initially led her Democratic challenger by about 16,000 votes the day after Election Day. However, the slow count of mail-in ballots pushed Sinema into the lead and eventually handed her victory.
McSally wasn’t the only Arizona Republican who saw her lead vanish as outstanding ballots trickled in.
Republican Frank Riggs initially led Democrat Kathy Hoffman in the race for Arizona superintendent of public instruction. He went on to lose about a week later. Katie Hobbs, the Democratic candidate for Arizona Secretary of State, had been trailing Republican Steve Gaynor on Election Day, and The Associated Press went so far as to project Gaynor the winner that night. However, after several days of ballot counting, the Democratic candidate is expected to win that race.