This is only the second pool we have tried to install.  The last one was over 10 years ago.  We read instructions, watched how-to videos, and had several hands to help.  We replaced an older pool in the ame spot.  We finished with relatively few issues and started filling the pool with well water (about 1-1/2" per hour).  After 4-5 hours the wall started buckling at a few verticals on one side of the pool (varies but 2-4" inward from vertical).  It was a somewhat warm day (65-70 F) with partial sun.  I stopped the water and started looking at the bottom of the wall to see if there was anything obviously holding up the bottom rail etc.  The liner looks pretty tight and it is not stretched to the cove yet.  There are a few wrinkles on the bottom of the liner.  I checked the product labels to make sure we didn't have mismatched products but the pool and liner are both 52" so that seemed fine.  I am not sure what to do next.  I am reading that filling slowly on warm days only will work but that will take a couple of weeks where I live.  I am just wondering whether the buckling will come out when the pool is full or do I need to back up and redo anything we already did?  Is there any chance the liner was mislabeled (52" vs 48").  Please help with some advice!