possible explanation
I found something that might explain the wrong engine selection for shutdown:
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A prop that has autofeathered is being turned with an enormous amount of power. The resultant torque has an incredible effect on the rest of the airplane, trying to turn the airplane about the prop (i.e. roll moment) - much the same as a helicopter with a failed tail rotor.
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"Additionally, if the uncommanded autofeather is not correctly identified, there is a real tendency, demonstrated time and again in simulators, for shutting down the wrong engine. Hence the importance of verifying engine malfunctions from as many indications as possible prior to taking any action towards shutting down."
So no2 error trigger the autofeather of that engine - this banks the plane into the other engine making them think is was that other one who failed .