Hello, the liner in part of my pool is below the water level and thus water is now behind the liner. I cannot pick up the liner because it is so heavy with the weight of the water.
1. Is this hurting my pool
2. How much to replace a new liner and have it installed for a 16ft round pool

Thanks!

Your current liner was not installed correctly and will continue to fail shortly. It isn't going to hurt anything else but it will start losing more and more water. The liner is not reuseable and a new one would run you about $250 and that much again to get it installed.