The Importance of Being Phoebe - S5-E11
Continuity mistake: When Phoebe is lying on the ground and is supposed to be unconscious, when Cole goes to pick her up you can see Phoebe throw her arms around his neck. (00:29:15)
Continuity mistake: In 3-5 Sight Unseen, we can clearly see Cole turn the air conditioning very cold and open all the windows so that the Prue, Piper and Phoebe can see the invisible demon, and in season 2 when Prue is turned into a man Phoebe asks "did you fix the air conditioning?" But in this episode Phoebe asks Piper why they have never invested in air conditioning.
Continuity mistake: When Paige follows Phoebe into the kitchen and is trying to convince her that she is telling the truth, Phoebe's right earring is missing in the shots showing both women, but it is there when the shot changes to close ups of Phoebe. It is an awfully large earring to be hidden by her hair in the two-shot. (00:25:20)
Continuity mistake: When Adam spills coffee all over Phoebe's top in the office, the stain disappears and reappears between shots. (00:08:05)
Continuity mistake: In the episode "A Witch in Time," when Phoebe and Piper are going to Miles' work to get him for the first time, Phoebe runs up the steps to his work and she is wearing leather boots with a skinny heel. Then, when she and Piper are running to where the police shoot-out is, Phoebe is wearing tan Ugs. Then, when they get there and Piper freezes the scene and Phoebe is getting the bullets out of the air, she is wearing the leather boots again. (00:06:45)
Continuity mistake: When Paige is telling the others she thinks Lydia is the one Cree was after, she says 'I think Lydia was the one who summoned that dust storm', but none of the sisters were present when the dust storm was summoned. They only arrived afterwards. (00:33:40)
Continuity mistake: Lydia has green eyes, but when Orin extracts them at the morgue, the eyes he puts into his head are blue. (00:34:00)
Continuity mistake: After Piper puts Little Red Riding Hood's cloak on and travels into the book we see a close up of the book and the cloak is still lying behind it. (00:36:50)
Continuity mistake: In the scene where Phoebe dangles the slumlord from the roof, the TransAmerica Pyramid can be seen behind Phoebe and Cole. A subsequent shot, after Phoebe tosses the slumlord back onto the roof, is take from the opposite side, but the TransAmerica Pyramid is still behind them, and is much closer. (00:25:25)
Continuity mistake: When Leo and Ramus are talking in front of the bay windows, the door behind Ramus switches from closed in the wide shots to open in the close-ups. (00:31:50 - 00:33:00)
Siren Song - S5-E4
Continuity mistake: When Piper and Paige fall out the window and land in the dumpster, in the wide shot the garbage bags are white, and in the close-up they're blue. (00:16:45)
Continuity mistake: When Phoebe goes to get her palm read, Madame Theresa draws lines on her hand. But when she first enters the room and sits down the lines are already visible on her hand, before they have been drawn there. (00:01:00)
The Importance of Being Phoebe - S5-E11
Continuity mistake: Paige's green top that covers her black t-shirt constantly changes from being on her shoulder to off, particularly in the police station scene. (00:11:10)
The Day The Magic Died - S5-E15
Continuity mistake: In the beginning, Paige is wearing a shirt with the scrunching sleeve on the right and slanting on the left. In following scenes, the scrunching sleeve is on the left and slanting on the right. (00:07:40)
Continuity mistake: Just after 'the Aggressor' tears the picture of the girls, they all change back to their normal clothes, however in one shot, Paige's arm is visible and she is still wearing her costume. (00:34:35)
Continuity mistake: The drawings of the sisters, change from when they were in the book, to when the Aggressor tore the paper. (00:33:55)
Continuity mistake: When the Charmed Ones decide to try to vanquish Cole, Paige says that the newest potions they mixed should work, since they're "at least as strong as the ones [they] used on the Source." But they never used any potions that had an effect on the Source. (00:34:50)
Continuity mistake: Watch Paige's right shoulder throughout this episode. Every once and a while you can see her black bra strap disappear, reappear, and disappear again between shots. (00:24:30)
House Call - S5-E13
Continuity mistake: Leo orbed from the Manor to Hell while it was full daylight. He orbed Jessica straight to the church, there was a brief scene, and then Leo and Paige orbed directly back to the Manor, but by the time they arrived it was completely dark. (00:31:45 - 00:33:45)
Continuity mistake: Paige's headstone reports her year of birth as 1975. But in episode 4-2: "Charmed Again, Part Two," Paige spoke with the nun to whom she was given as an infant on August 2, 1977, and Paige is always described as having been "given up at birth" by Patty and Sam. (00:27:15)
Answer: That was a mistake in the series.
Also, the episode is called 'Babies First Demon' and this alone tells us that it's Wyatt's first time in the field (so to speak) and as the sisters say, they've done a good job of clearing up their own magical messes so far. Nobody really knows how advanced Wyatt's powers are, or will become. That's why the cleaners appear, to nip things in the bud. The Cleaners didn't want to chance that the sisters could clean Wyatt's magic up, just incase they couldn't. Therefore intervening themselves, just in case.