Sounds like your ignition switch is bad. The electrical portion is pretty cheap from a dealer from what I remember. I replaced the part on my '92 a few years back due to LOSS of starting position portion going out. Your switch sounds like it's managed to arc over and engage multiple contacts once you get to just the RUN position. <img src="/forums/images/graemlins/drunk.gif" alt="" /> Let us know what you find out.

'92 SR Montero, Green, with 31" Yokohama Geolandar A/T Plus Tires, Mitsu factory fog light kit, on-board air compressor,Sony Radio and 10 disc changer. 213K and counting.....
Stock & Happy otherwise