You are aware that the clock starts back as soon as the ref puts the ball down
That is correct. But, the play was reviewed, and determined that there was 1 second left on the clock. Per the NCAA rules, the clock is stopped following a review, and there is no runoff. The NFL has a rule in place so that there is a 10 second runoff after reviews. I'm sure Saban will whine enough to get that implemented in the NCAA rule book soon enough