King County elections spokeswoman Kim van Ekstrom says that while some voters will get two ballots, one of them has already been suspended. She says voters receiving two ballots will get one that marked "replacement ballot."
Van Ekstrom says that the county sends their voter information to the printing vendor to create ballots on September 27.
But voters who updated their personal information after October 9 may get the replacement ballot because there wasn't enough time to stop the printing of the first one.
She says there are about 10,000 voters who updated their information during that late time frame.