Clock management in high school game (no shot clock)

[Jorrflv]

In a game tonight there was 4 seconds left when teem A stole the ball. The player proceeded down court and was called for a traveling violation. The whistle blew and the clock was stopped with .9 seconds left. The coach from team B complained that too much time ran off the clock. The officials conferred and the clock was reset to 3.9 seconds. First of all the officials were not looking at the clock and had no clue. Correct me if I am wrong, but in high school can an official add time like that? There is no way he would know wat to reset it too.