well went back today, did not have switches so i decided to experiment, i jumped the uts and tsl switches to eliminate switches, problem still occurred. pulled the switch tree off, and went thru all switches and wiring no problems found, put back and problem still occurred, installed new sensor card, same thing. now starting to get frustrated, when it does fail, i can here the car floor passing gong come on just as the car leaves, so I'm thinking to myself, it seems like the selector actually thinks it is further then it is, like it is counting to quickly. so i decide to recheck the first floor level magnet, and parity magnet for the umpteenth time. this time i flip both magnets upside down from there original position, realign again, and put back in service ran the car continually for nearly 3 hours and now the car will not fail. now I'm thinking the elevator gods are screwing with me, it just can't be, the car is going to fail, but it is still running. packed up my tools, left with my tail between my arse, feeling a few years older, and not very much wiser. will keep you posted