I just moved into a 3rd floor apartment, first time in this large of a building. since I have moved, I have noticed 2 problems with my A/C.

First, it never seem to cool off the apartment. I had the thermostat set for 75 last night, as far as I know it never dropped that low...and it was about that temp outside(also raining, hence no windows open).

Second, I get almost no air out of the bathroom register, which is a standard ceiling grill, but only has a 1" hole in the back of it. at the same time the a/c is running, I hear a loud rattling noise above my bathroom. I believe all three floors have their A/C's on the ground.

My questions are, are either of these normal, or would I be correct in going to the management staff?