What kind of pic would help,?? just of the pool wall itself???
You can see the top of the wall, kind of move outward, then move back in with the waves. Like I said , with 2-3 kids in it, it dosn't move, yet with 4-5 making a lot of waves, it moves a little.
I can be on the outside of the pool and at the corners push the wall inward a little.
Hope that helps