1996 Ford Explorer seats problems

My family drove to a store (6/21/04) and left our 1996 ford explorer in the parking lot for approximately one hour. When we returned the front of the cab was filled with smoke. We started trying to find what smelled so bad, and what was smoking. My husband realized the smoke was coming from under the drivers seat. He was able to move the seat up (electronic) and after burning his finger he was able to unplug the six way seat adjustment motor.

Drivers side seat belt receiver does not clasp seat belt. We are taking the vehicle to a local shop to replace the receiver at $100 for the part plus labor. A seat belt receiver should be built to last normal driving conditions. This vehicle has not been in any kind of accident. The driver's side seat collapsed in the recline position on 8/24/2011, fortunately this occurred when the vehicle was not in motion. The recline mechanism does not work, and the seat does not stay upright.