Continuity mistake: At the beginning of the show when Piper comes into the kitchen to help Paige, she is wearing slippers. In the next shot, when she is by Wyatt's chair, she is wearing flip flops.
The Bare Witch Project - S7-E2
Continuity mistake: At the end of the episode it is not Alyssa riding the horse to the café. Alyssa has a tattoo on her right ankle, which when we see when camera pans up the right leg the person riding the horse has no tattoo on the right foot, but when Alyssa rides away you can see the tattoo she has going round her right ankle.
Continuity mistake: When Leo hugs Wyatt near the end of the episode, the way the pair hold onto each other changes. (00:38:15)
Charrrmed! - S7-E4
Continuity mistake: When Black Jack Cutting's parrot delivers the invitation to Piper and Phoebe, it drops the invitation on the window sill. When Leo goes to pick the letter up, it moves closer to him than it was before (in particular, watch it relative to the parrot's left foot). (00:29:40)
Charrrmed! - S7-E4
Continuity mistake: When Piper watches Leo sleeping with Wyatt and Chris, the book on Leo's chest disappears and then reappears. (00:38:45 - 00:39:15)
Charrrmed! - S7-E4
Continuity mistake: Baby Chris doesn't have a binkie in his mouth, then does, then doesn't. (00:39:23)
Continuity mistake: In the beginning when you see Piper and Paige sitting in the car talking on their cell phones, Paige has hers in her right hand. You can see she has a ring on one of her fingers. In different shots the ring is gone. (00:00:30)
Continuity mistake: For season 7, episode 5. In the beginning, Piper is wearing a top with the blue skinny strap on her right. For the rest of the episode, you can see the strap on her left.
Continuity mistake: When Phoebe talks to Leslie about him leaving, her arms change between shots from hanging by her sides to her hands clasped together in front of her. (00:11:50)
Someone to Witch Over Me - S7-E7
Continuity mistake: When Paige talks to agent Brody at his apartment, her hair moves from covering her shirt straps to not, then covering them again. (00:09:45)
Someone to Witch Over Me - S7-E7
Continuity mistake: In episode 7-7: "Someone to Witch Over Me," Piper is killed by the demon Sarpedon's metallic claw. When the claw strikes her, she falls back with her arms behind her, landing partially on her palms, allowing her to complete the fall by sinking gradually to the ground. Then there is a cut to a closer shot, and we see her fall again. The second time, she falls directly into a more prone position with her arms raised and the backs of both hands facing the ground.
There's Something About Leo - S7-E9
Continuity mistake: When Leo is preparing to tell Piper that he's an Avatar, Piper has an orange bowl in her hand and sets it down on the table. In the next shot, she's holding the bowl again and sets it down a second time. (00:17:45)
Continuity mistake: Midway through the episode, the Seer is looking through the sisters' photo album. Several of the photos actually include everyone who was present for the events depicted, leaving nobody to take the photo. And since the events were shown in various episodes, we know that no photo was taken at those times by any automated method.
Continuity mistake: In the second to last scene where Piper tests her powers on the lamp and Phoebe is cleaning, you can see Piper's bra strap when she blows up the lamp but when she turns to face Phoebe its covered. Through out the scene it's covered and exposed without her ever adjusting her shirt.
Show Ghouls - S7-E15
Continuity mistake: When Phoebe is on the phone with Elise about the Cosmo interview, she jumps between shots from leaning over the kitchen table to sitting straight up. (00:05:45)
Continuity mistake: After Leo rescues the driver in Texas, when it cuts to the manor Phoebe is wearing a pair of white gloves which she takes off and puts in her pocket, but when Phoebe insists she will not save another innocent until she finds out what happened to Leo, Phoebe is wearing both gloves again. (00:07:45)
Continuity mistake: When Piper is talking to Cole, they show the other Piper on the couch. Whenever you see Piper talking, you can see that the other Piper's legs change position throughout the shot. They go from being straight to both legs bent to one leg bent to straight. (00:18:00)
Continuity mistake: In this episode, Phoebe told Drake that she "can't believe it's been three weeks already", but Drake said in "Carpe Demon" that he only had two weeks to live.
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)
Continuity mistake: When Paige is complaining to Leo about not having time to take on a charge as a Whitelighter, she rests her head in both of her hands on the kitchen table. In the next shot, her head is only resting on her right hand. (00:00:30)
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.