Hello! We are new pool owners from Cleveland. Found this page looking for a solution to a problem. We had our agp professionally installed just last year. We took the cover off and everything last weekend and all was great. Until we noticed that some of the liner was 'showing' in a certain section. Investigating we noticed the wall was out if the track and the railing was lifted which us why we were seeing the blue part of the liner. From what I have read so far it appears thus means the ground wasn't leveled properly ??. Any thoughts or ideas where to go from here? We just got a heater and we're looking forward to a longer pool season .. uggh ...thanks in advance!!!