QB Shift OK or Illegal Procedure??

[BoBo]

The quaterback comes up under center then realized he was suppose to in the shotgun formation. He has already put his hands under center for the snap then shifts to a shotgun position.

1. Is this a legal shift?

2. Is this legal as long as he does not influence the defense with his shift?

3. Once he has committed does he have stay under center?

4. QB under center but raises to call timeout, generally not called a penalty!?!?

Had it happen Friday only once and the defense never reacted so we let it slide once. Told QB if was going to shift to keeps hands on center butt as not to influence defense.

Comments??