I had a wood laminate floor installed about 2 months ago in living room, dining room, kitchen & hallway. It looks beautiful but there are several areas where the laminate is raised (about 5 feet from front door, 2 foot area), 2 foot area by kitchen. It is not flat to the floor and moves up and down when walked on but the planks are not coming apart. What is causing this and can it be corrected?