Ok, I think I see the distinction. I recognize that it is tempting to postulate a 2 part decision theory because it seems that we have two different kinds of considerations to deal with. It seems we just can't compare ethical motivations like loyalty with selfish motivations like getting a light sentence. "It is like comparing apples and oranges!", screams our intuition.

However my intuition has a piece screaming even louder, "It is one decision, you idiot! Of course you have to bring all of the various kinds of considerations together to make the decision. Shut up and calculate - then decide."