Continuity mistake: At Phoebe's high school reunion, the gym teacher holds out a name tag in her left hand, but then Paige takes it from her right. (00:07:50)
Plot hole: Rick is menacing Phoebe with a gun near the end of the episode. Why doesn't Paige orb the gun away from him? In fact, why did Phoebe make Piper stay upstairs? Piper could have frozen Rick, and Paige could have orbed him back to the prison. There were several obvious ways to resolve this situation that would not have caused Rick's death.
Revealing mistake: As Phoebe and Rick are in the car about to do the robbery, she pulls out in front of the armoured van and as she drives out onto the road you see Phoebe's stunt doubles face.
Chosen answer: Her agent/manager negotiated a special billing as part of her contract. It distinguishes her from the rest of the cast, probably when she became a producer on the show.
JC Fernandez