Wow, thank you both. That was quick.
As for the concrete drying in 1 - 2 days, maybe I should point out 2 things:
I live in Colorado (very dry).
It wasn't necessarily "concrete" that he poured - it was something like concrete that came in big bags of powder that he mixed with water, it was very thin, so that might make a difference. The thickness of it couldn't have been more than an inch at any point.
He used a moisture testing device all over the place before he decided to start the installation . . . so I assumed he knew what he was doing?
The moisture barrier we used was Roberts Harmony 3-in-1 premium underlayment, if that matters.
I just don't understand what went wrong - the contractor seemed to understand the importance of waiting until it was safely dry . . . and I bought the most expensive underlayment I could find.
And I promise, I really do use a wet swiffer, and am very careful to make sure it dries quickly. And since I'm being honest, I don't even do that all that often
With this in mind, do you still think it could be moisture? I mean, that's the only thing I can think of too . . .
Is it reasonable to expect Pergo to be completely smooth at the seams? Or is some "cupping" to be expected? Honestly, what I was hoping would happen was the inspector coming out, looking at the floor, and saying "That?! Oh that's totally normal, no problem, you're just being too picky!".
Because, honestly, the way it LOOKS right NOW doesn't bother me too much. What really worries me is that if it is gradual moisture damage, it will continue to get worse.