Go back and look at your lease. The lease you originally signed should have had the apartment number you were moving into on it already. When you agreed to the first floor, was it in writing? Was it stipulated that it was a temporary thing until your apartment was cleaned? Also, ask the apartment manager why they want you to pay pet fees, applications, and all that all over again. It may be stipulated in your lease that you have to do that if you want to switch apartments. I know the last apartment we lived in had a clause like that where there was a $500 transfer fee to switch apartments in the building. But if your lease also says that you are leasing the other apartment, then they should have to give it to you. Read over your lease (and renewal if you've had to sign one after being there more than a year) and post back.