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)
The Importance of Being Phoebe - S5-E11
Revealing mistake: When Kaya throws the knife at Phoebe watch in freeze-frame and you can see that for the shot from behind her there's no knife in her hands. (00:36:10)
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 Importance of Being Phoebe - S5-E11
Continuity mistake: When Kaia, pretending to be Phoebe, holds up the document from the bail bondsman, it jumps from her left hand to her right. (00:33:20)
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.