Sympathy for the Demon - S5-E7
Visible crew/equipment: After Paige orbs the potion onto Barbas and Cole absorbs all the powers, in the shot of Barbas getting up from the floor we can see a blue T-mark and an orange T-mark taped to the rug. (00:39:05)
Plot hole: When Phoebe and Paige are be sent through Piper and Leo's past we see things that that cannot be true. 1. When Leo was dying in "Love Hurts" you see Piper and Leo orbing, but in the actual episode they walked down the stairs. 2. In "Just Harried" we see the cake fall and the Statue skid on the floor, but in the actual episode it was caught under the cake.
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)
Plot hole: Paige says she cannot wait to tell the local witch doctors that Borneo demons are not impervious to magical powers. But in the episode 'House Call', they act as if they have never heard of witch doctors, let alone dealt with them. (00:01:45)
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)
Other mistake: If all the objects in the fortress are originals from the fairy tales, why are the ruby slippers red? In the original story the slippers were silver, they were made red for the MGM movie, so they would be the brightest thing on the screen.
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)
Necromancing the Stone - S5-E21
Visible crew/equipment: When Piper hits the mirror after being thrown across the room by the energy bolt, look closely at the roof in the other room: a black rectangular hole with a stage light poking out of it is visible.
Revealing mistake: When Piper blows up the painting you can see the hole used to put the charge into to blow it up. (00:57:40)
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)
House Call - S5-E13
Revealing mistake: When Piper made the house vanish, and she, Paige and Leo ran up to where it was, the background was obviously fake. (00:35:35)
The Day The Magic Died - S5-E15
Plot hole: In the episode "The Day Magic Died," Phoebe and Paige first find out that magic is down when Paige tries to orb the unicorn. But, when she tries to orb it, she makes a scrunched up face that would suggest that she knew magic was out and she hoped that she could orb.
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.