I recently purchased a Intex 15x48 Metal frame pool. My backyard is mostly concrete so the bottom is level. I went to Home Depot and picked up 2 heavy duty tarps. The ground cloth and the rope was not included in my package. Set up was easy enough and I checked each upright 3 times with a 4 ft level as a hose was filling the pool. I left the water running overnight and when I awoke the pool was just about filled, but the uprights were not longer straight. They had moved away and the bottom looked more like an Easy Set with a caldron bottom. My question is this something I should be concerned about? If so what would you suggest? I want my family to enjoy the pool and I want to remain friendly with my neighbors. Also any idea what the approximate life expectancy is on this type of pool. Thank you for any info.