OK
Tom said it is not the top rails that are not pulling in. It is the walls that are being pulled down & out of the top rails & in in towards the water.
We only put 2-3 inches of water in from the hose.

Then We got 5" of rain in 24 hours.
Flood warnings everywhere.

The pump in there and we got some water out. One of the wall sections that was *sucking in* just popped back out and into it's proper position.
I am hoping that removing some of the water will relieve the pressure on the liner & walls.

We've got to figure out the reason for this problem.
Could it be that we didn't install the liner properly? But the seams were staight.
Could it be that the liner is too short?
Could the liner be too short b/c we followed the Happy Bottom instructions and did NOT put 2" of fill material on the bottom?
Could it be something else??????

Can't wait to hear what the sales lady says tomorrow....
So sad,
~Hoffmans