If you moved out within the limits of the 30 day notice you do not owe any money. This is the kind of crap that property managers pull. The manager talked you into staying so he could trap you into paying another month which he sticks in his pocket. You can bet the landlord will never see that money if you pay it. You need to find the landlord and talk to him about the deposit and the notice. Many states do not allow the deposit to be used for rent. Take the landlord to court. Do not pay any more money.