it sure does appear the chademo station tried pumping in power at voltages over 120v HIGHER then my pack is rated at.
That's the most likely scenario. There's no way the station is even capable of pushing 120V over the pack's voltage and if the car sees anything funky at all it should immediately open the contactors.You were probably seeing the isolation check process. I'm not sure why the car displayed it, but it happens before all chademo sessions. The contactors stay open, and the station applies voltage to see if any current leaks. If anything leaks, there is a compromise in the circuit isolation, and it prevents the session from continuing.