@sbinaz You might want to clarify whether the first chance to put down a housing deposit is after everyone commits (SIR deadline is May 1) or if it is ASAP after students receive their acceptance. The University of Arizona FAQ says you can put your deposit down as soon as you are accepted.
This is common at many colleges. The bottom floors are more social (ex. group studying) and there are more noise limits as you move towards the top of the building. Top floors are usually designated as quiet.