Drivers seat cushion

Just curious if anyone else had this problem. The left thigh support on the seat bottom is already completly flat and it feels that when sitting, the seat leans slightly to the left. All the other seats are holding up great even the right side of the seat which is where I tend to lean. Is this something that is fair to make the dealership fix under warranty. I have had the thing for 6 months and 15,000 miles so it concerns me what it will be like in another year. Thanks for the input.