In this episode it is said that the only way a genie can be freed is for the master to wish it free and then they become the genie. Yet in the season 2 episode Prue wishes the Genie free and does not have to switch places. Which could be possibly be explained by Jinny's curse however in this episode when Phoebe became the Genie she had to listen to Chris when he ordered her into the bottle. But in the season 2 episode The Genie would not listen to Phoebe when she tried to make him leave her alone. In fact once released he pretty much did whatever and went wherever he wanted. Side Note: Jinny the Genie was a demon who was cursed by someone. That is why whoever freed her would change places with her, not because she was a Genie.