Because it is a designed play for a quick pass. No one making a correction pre-snap (Mangold or Sanchez) or Schotty making one after seeing how badly the 1st one played out is beyond me.
they said Moore is showing a lot of confidence in Painter by letting him throw. Not really. If you're taking Manning out, you already made the statement that winning is not the #1 priority here. What's the alternative? Take Manning out and run it on every down?