Having a new liner put in on the inground pool that "came" with the house I wanted. Noticed tonight while its filling that its not sitting flush against the "corners" of the sloped sides and the vertical sides--the sloped sides being the transition between the horizontal bottom and the vertical sides. The best way to describe it is that the vinyl is pulled taught such that it is curved. Is this a problem I should address with the installer immediately, ie. bad fitting, or is it an intentional thing that is done to let the weight of the water stretch the liner flush with all surfaces? Thanks for your help!