Installed above ground pool last summer and kept it up using BBB from the start. I winterized follow BBB method and just removed cover after a long long winter. The water was crystal clear but I do have one concern. On one side of the pool the liner at the top by the rail has a bag/wrinkle. Is this something to worry about and if so how do I fix it. Will it go away when I finish filling the pool? Thanks for the help