Couple Questions on 12/29 NFL Games

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First, in the Eagles-Cowboys game, the Cowboys were flagged for delay of game, but it appears the play clock was reset to 25 seconds and not 40. Is there one official in charge of keeping the clock, and, if so, how does a 15 second discrepancy get overlooked? The penalty ultimately didn't hurt Dallas, as they ended up scoring a touchdown a few plays later.

Second, in the Chiefs-Chargers game, KC was lined up to kick a 41-yard field goal with eight seconds left. They ended up missing, but San Diego had seven players lined up on one side of their formation. If that had been observed by the officials it would have been a five yard penalty, correct? It ended up being significant because if KC had gotten to retry from 36 yards out, there's a high probability he makes it with no time left, and it actually would have changed the AFC playoff picture. The way I understand it is that it's a new rule that was likely overlooked. Is it one official's responsibility to look for that, or can anyone call it?