Since the polling/voting locations/staff know exactly how many registered voters there are, it would seem they would print that amount (+ extras) to ensure there would be enough ballots.
each district should have provisional ballots as well. And emergency ballots?
...and have no established procedure to insure the total number of votes cast does not exceed the number of ballots printed or the number of registered voters.
It doesnt matter when the outcome has been decided beforehand.