I just had the problem occur again. Re-set overnight. At this point (even though the system has reset) we notice the car is not running as smooth as normal. Most noticable is a rough idle and upon going up hills the transmission feels like it slips and you can notice the rpm needle moving erraticly till you crest the hill.
Going back into the shop next week...no idea what they plan to do. They want it for a week.