Hoping to get some help/advice! We just had a 18x33 oval pool installed today. When getting home to look at it, it looks as if the curves are bowed out. I've seen oval pools at friends houses, and they don't look like this. Is this something the installer could correct? I only put about a foot of water in it and wanted to get some advice before filling it 3/4 the way. Any help would be greatly appreciated!