Did you leave enough of an expansion gap around the edges of the floor where it meets the wall ect...even so all types of floors will move in some way I've seen solid wooden floors that move when walked on in some areas.
Your floor needs time to settle have you put your furniture back in the room yet? If not then you should as the weight of the furniture will also help the floor to settle properly.
Good Luck
The natural materials in the flooring need to adjust to the temperature and environment in your home. Store the packs - unopened - horizontally for 48 hours in the room where they are about to be laid before setting to work.
The important gap:
The wood in the flooring will naturally contract and expand with the changing temperature. For this reason, the flooring will need to be fitted with a small gap between it and any fixed objects. Gap spacers are available to suit the particular type of flooring you choose. This gap can later be concealed using beading/skirting.
1. Clean and dry the floor, removing any bumps and filling any indentations.
2. Lay the first board into one corner, with the grooved sides towards the two walls.
3. The floor usually looks best if the planks are laid in the same direction as incoming light. Hallways and long, narrow rooms look best if the planks are installed along the length of the room, irrespective of the light source.
4. Measure the width of the room. The final row may have to be sawn lengthwise if the planks don't match the width of the room exactly. If the final row is narrower than 50mm the best result will be achieved if you saw the planks in both the first and last rows.
5. Use spacers to create the required expansion gap (this will vary between 8 and 15mm). Please follow the manufacturer's recommendations.