[Monkeydad]

I worked in the flooring business for a while (on the accounting side but I still learned a lot).

It doesn't sound like that flooring was installed properly, more specifically, the wrong underlayment and concrete probably wasn't prepped properly. If you're installing any type of wood or laminate over concrete, you need to do some waterproofing and use a barrier that will prevent concrete's natural moisture from touching the wood. Warping is a sign that the install wasn't done correctly. These types of floors are typically not glued down either. I bet they glued it right to the concrete.

I'd get a good flooring contractor to look at it for you. They should not be charging you for this damage because it doesn't sound like you caused it.

I'd even question the painting of the walls. Don't most landlords paint after every tenant anyway to freshen it up for a new move-in?