Mike, as Brad said, it's no big deal - liners, especially new ones, do that. Hope everything works out for you

Brad, your crew isn't installing them right if you have to 'liner lock' the entire pool. You can feel when the liner goes in right. There's a small difference between a bead that is in enough to look good and one that's properly seated, but it can be felt. I see the liner popping out of the side that whichever new guy put in. 'Locking' the whole thing seems a bit excessive, but 'locking' insures that the bead is all the way in, and less call-backs is a good and wholesome thing
Sorry to everyone else who read this, for the 'shop talk'