I don't think that happened. Dungy said after the game that they were going for it all along, but the kicking team got a little excited and started onto the field. manning, who is listening to the coaches via the headphone in his helmet, knew that dungy had decided to go for it, and motioned the kicking team back off the field.
he didn't overrule dungy; he just knew what the play was before the special teams players because he was wired.
You might be right, but at the time it appeared that Peyton was going against Dungy.