Pull the handle up and the seat moves forward, the chair (bottom section) slides forward. If you then move the upright (back section) to its original position without moving the base section (the bit where the bottom goes) then the base section will not go back to its original setting. The correct way is to do this.....Lift the handle up, move the back section forward and slide the bottom section forward. Let the passenge in. Slide the base of the seat back to it's original position (the seat of the chair) then lift the handle and move the back section of the seat to its original place. I hope this makes sence as I have had a few beers!