We bought this pool used and my husband and son-in-law disassembled it at the previous owner's home. We are in th midst of setup and noticed that 3 of the corner walls are the same and one is different...any advice here??? Not sure since they didn't take any pics of it while they were taking it apart. But water is getting delivered on Tuesday so we are in a pinch to finish. Any advice on trying to re-use the liner as well?????