Floating floor dynamics.
This is pretty much the way I figured it. I was asking because I don't ever see mentioned of this in the instructions for laminate floorings. I've put in two lam floors in my house, and had no problems. But then spot checking the edge cracks says that the floors don't move much.
Because of the shape of the floor (The room has 16 sides, 2 non-door openings, 5 doors, an open stair, a wood stove, and an island, plus counters, appliances...) I think that a floating floor is a mistake. It's only advantage is that it is fast and cheap. At this point, my two options are ceramic or a nail down wood floor
The Allure flooring in the dining room however, even with the edge gaps has had problems. But the temperature changes in that room are greater than the specs -- it has a lot of windows, and we used as our plant room. It gets quite warm in summer, and chilly in winter. Allure's website says that it's supposed to be good only from 65 to 85 F. Frankly, I expect that flooring should be good from freezing (you have to keep the pipes thawed anyway...) to 120 (You turn off the air conditioning when you are away) I'll know better next time.