The admission was likely made only because a New York team came up on the short end.
The Giants were involved in an odd situation against the Dallas Cowboys back in the late 1980s. The Giants were awarded a safety on the opening kickoff when the Dallas kick returner muffed the kick in his own end zone and was tackled trying to run it out.
It turns out that Dallas should have had the ball on their 20 yard-line. A safety on a punt or kickoff only occurs if the returner muffs the kick outside the endzone and gets tackled inside the end zone.
Not only did the NFL announce after the game that a mistake had been made, but the entire team of off-field officials for that game was fired before the end of the day.