What I was thinking. This is sort of a stinky deal. Sure, it seems the refs made a mistake. They also announced the mistake they made before the ball was snapped. The Lions most certainly heard it but as you said, no time outs. It would have been nice for somebody from the Lions or Cowboys to have commented on this specific aspect. Detroit handled it post game reasonably well. It's not like they just torched the earth. But they did make it seem like they had no awareness that confusion could have occurred pre play. They could have taken the penalty and kicked.