However, they must be reset by a poll worker between each vote. This is done using a device called a PEB that is slid into the machine and then withdrawn. In a precinct with multiple ballots, the poll worker must also select the right ballot. Then the voter gets to cast their vote.
Election day will certainly be interesting :)
Does the machine produce a tangible log of when votes were recorded? This would not seem like it should be considered a compromise of confidentiality, but if all the machines in a precinct saw 100 votes cast in the last half-hour, it might raise some questions.