To reset the seat I switch the ignition on but do not start the engine. Next I move the seat forward and back twice and then switch ignition off. I then turn ignition on and start the engine. The seat then normally works correctly.
Welcome to the Club. I purchased a Granturismo in March last year. Had the audio upgraded to the large screen which is compatible with Apple car play and has rear camera. Excellent job done by Audiofile Incar of Cambridge. Cost £2k which also included an immobiliser as part of the ignition to reduce risk of theft.