Hi. I have a question. I am currently having an inground concrete pool installed. For simplicity sake, the pool is 78' Linear feet. However, when I measured the walls with my laser measuring device I discovered that the 26' ft wall is actually 25'.10", 13' ft wall is 12'.10", 20' ft wall is 19'.10" and 6' ft wall is 5'.10"; however, the 4' ft wall is correct at 4' ft and the 9' ft wall is correct at 9' ft. My question is, why would this be? Is this normal? I feel like shorted pool area, and should this be discussed with the pool installer? Should I request a credit? Any advice would be greatly appreciated. Thank you in advance.