Phoebe went out with Ursula's ex-fiance, but it didn't work out.
Chandler hired a maid, Monica thought she was stealing her clothes, turned out she wasn't.
Rachel decided to move out because she though Joey would not want to live with a baby. She was looking for an apartment, and Ross went to great lengths to get her one in his building. In the end, Joey wanted her to stay so she did.
It's a lot funnier when you watch it.