Plot hole: When Gith takes the potion from Chris, he ends up stomping on it and shattering the potion bottle - making contact with the potion. We've seen that potions don't have to be thrown by someone who's even a witch for them to work (like when Cole's powers were stripped etc) so why on earth would he do this? And how did it not vanquish him? There are other ways he could have gotten rid of the potion that didn't involve a way that really should have vanquished him.
Plot hole: We are told that in the world of the Charmed Ones, desires aren't real. When they are transported back to the real world, Wyatt is transported too, even though the real Wyatt was never really there to begin with.rockycm