Quiz

I am giving a timed quiz and when a student submits the quiz with 12 or less seconds left they receive a 0 because the time limit is exceeded. If I check their time it shows up as 4:15 seconds for test that was completed in 3:48 seconds. Also if I just let the time expire it gives the me a 0 and says my time is 4:19 seconds for a 4 min test.