Had a new fiberglass pool installed, The tile border around the pool is not even all the way around the pool at the water line, the deep end seem to be sitting lower that the shallow end, One side of the deep end seem to be tilting to the side more then the other, We had heavy rain the other day and the pool filled all the up the water was over flowing on the deep side were it was tilted, the shallow end had at least 1 5/8" before it would over flow, the deep end on the side not tilted had about 1" before over flow, The pool has no concrete around it, The installer told me it would level it self as it sits, Is this true any help, Does the pool have to be reset ?