Strange E46 AC Problems

The car is a 1999 328i (U.S.) with about 65,000 miles.
With temp set at 59o and ambient air at 85o: 1 - Passenger side center and right vents produce warm (ca. 70o) air while
driver's vents produce cooled air (ca. 40o) 2 - Passenger's vents cannot be shut off. Neither rotary knob has any effect. 3 - Driver's vents can be shut off and then cool air will come from passenger vents. 4 - Recirculating air switch has no effect - seems to always be in fresh air mode. (This condition has existed for a while and may be unrelated to the above)
All 3 A/C fuses are OK. Anyone have any suggestions?
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