Continuity mistake: When Paige and Phoebe are knocked over by the large monster, the rug moves itself from being spread across the floor to scrunched up under them between shots.
Continuity mistake: When Phoebe is told that Jason asked not to be disturbed she decides to go in anyway, and right before she enters Jason's office the lace-up on the back of Phoebe's top is very loosely tied so we see a lot of skin, but when she's inside Jason's office the lace-up is tied quite tightly so only a bit of skin is seen. (00:11:40)
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.