As has already been noted. It seems that JW, Carmichael, and Allen all thought the clock was going to start, since the officials were running full speed to set the ball and move move the chains, like Landry was inbounds.
You're confusing the college game with the pro game. Clock does not stop like that after a 1st down unless the official signals to stop if the play ends out of bounds. If that's the case, shame on JW, DA, and Carmicheal.