I had gotten the impression that people often failed to distinguish between the two questions, although I suppose it's possible that they've all been refering to the first and that I've just been confused because when I hear "utility", I immediately think VNM. If that is the case, then I suppose you're right that I shouldn't be using population ethics there. I'm also somewhat averse to using "utility aggregation" in that sentence because I'd like that term to refer solely to the second question. [Edit: oops, I misread you. Perhaps "utilitarian aggregation" is a better term for the thing that includes both questions.]