Front Seat Power Adjust problems of the 2002 Dodge Ram 1500

I have a power assisted seat. I slowly began to notice that there is a rocking motion, it is very noticeable when I brake or accurate. It seems to get worst and I took it to the dealer who stated that they had another vehicle like mine and that it had the same motion. They stated that it was normal. If the rocking gets any worst, it may give the driver a different feel of the vehicle which may cause him to react incorrectly in different situations and cause an accident.