Yeah that seems like an unusual problem. I searched and only found one other complaint like that and there were no replies to it. There are lots of problems with the switches it seems. Just guessing, it seems like the memory function is kicking on, like it is adjusting for another driver. Does that sound right? Are there 3 buttons for 3 drivers or how does that work?

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra