CONF:
With the SS full forward, I would expect the elevators to be full leading edge up for a simulator full nose down command, and be displayed as such on the SD.
One then would in general expect the nose of the simulator to follow this command. Why it didn't in the 330 and evidently did in the 320 is what's at issue.
As far as SS commanded proportional 'G' and the THS, what was the 'G' indication in the Flight Data block during the full nose down SS command prior to manual re-trim?