Palpatine's Mistake
Palpatine asked Anakin to request the Jedi Council to let him lead the champaign against General Grievous. However, didn't Palpatine need him to stay on Coruscant to lure him to the Dark Side?
Anakin- The Chancellor has requested that I lead the champaign.
Mace- The Council makes its own decisions on who has to go, not the Chancellor (or watever he said, i dont remember completely)