Little Box of Horrors - S7-E18
Continuity mistake: When Paige complains about the ringing in her ear, she's rubbing her temple with her right hand and holding a coffee mug with her left. In the next shot, which is cut too fast for her to have moved, the hand on her temple has jumped to holding the coffee mug. The mug has also jumped to in front of her mouth. (00:01:45)
Valhalley of the Dolls (2) - S6-E2
Continuity mistake: When Jason is escorting Phoebe into his office her left arm is down by her side in the rear view. When the shot changes to the front view, her left arm is across her stomach.
Revealing mistake: In the scene where Penny uses her powers at Nicholas and throws him on the dining table, it is clear that the table is a fake one simply made of simple wooden boards.
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