We have an inground vinyl over steel wall kit from PW and are attempting the liner install today. Rolled it all out, and noticed that the spacing between seams is a bit off. For example, it's a "sport court" bottom, so shallow at each and, and deep in the middle. The hopper should be 24" wide, but I'm measuring about 21.5" between the seams. Is it expected this will stretch a bit once water is added? We're just a little nervous because we didn't notice right away that the liner box had a picture of a pool layout printed on a sticker, and it does NOT show a sport court, but one end as the deep end and one end shallow.