We had a daylight game and a player pushing destroyers had a destroyer targeted with torpedoes. He rolled 2 D6 per the evasion rules and the lucky dog rolled a pair of 2's. I knew that at least one of the 2's was to be added to the attacker's resolution DR but I was not certain about the second. I checked the rules and could not determine from the text of the rule if the DR results were cumulative or not. It seemed to me that they should and I ruled it that way which with no good deed going unpunished caused me to miss.
My first question is did I rule right or did I make a mistake?
My second question has to do with the effect of the above rule on duds. As I understand it, a successful evasion DR is added to the attacker's DR result. That might not only run the adjusted DR result out of the number range required for a hit but might very well also change it to a dud. Am I understanding that correctly?