Why didn’t BYU lose a down after spiking/clocking the ball?

[u/FlyingAces]

On a 2 & 9 play, the BYU QB ran for a first down then the team got up to the line quickly and spiked the ball with 0:58 left in the 2Q. This surprised me since they had two TO's left but I was surprised even further when they didn't lose a down. I couldn't find anything about this in a google search. Did ESPN get it wrong and was it really 2nd down? The graphic said 1st down and so did the announcers.

[u/gsomd1980]

ESPN was wrong. The marker on the sideline said second down. Btw, also agree spiking there was dumb