Turbo Timer Problems > Starter Motor

Hello laydees and gents!!

sometimes when i turn off the car (switching the key to off position - to start the turbo timer countdown) the starter motor kicks in.... most time the engine ticks over as it should and i have no problems, but like i said sometimes the starter kicks in and keeps turning...... also sometimes if the keys are out and its ticking over fine.. the starter will kick in if i turn the steering wheel more than a few degrees?? Finally.. i was listening to the radio one day (engine was not even running) and when i turned the key to take it out of the ignition it fired up the starter and turned on the engine....
i was using it wired up by myself, but got the wiring harness thinking it was my wiring but its no different.. anyone got any ideas?? bad earthing? bad timer? power steering interfering??
and has anyone else expeirenced this problem?
mine is a 95 Toyota Starlet GT turbo with a Blitz DCII timer any help on this would be GREATLY appreciated!!!

cheers
Later
Macker
(p.s - im looking at Beyonce on the TV here..... ohhhhhhhhhh!!!!!)