We have had our pool installed for about 4 weeks now, professionally by the company we purchased the pool from. After some splash out and evap, I've noticed 2 sections that are 1/2"-1" lower than the rest, judging by the water line against the liner. The guys building my deck said that it is about a half inch off from the center. Is this reason for concern? Should it settle this quickly? Should I call the company where it was purchased?