I guess the argument is rather linguistic.
It doesn't sound right to me too that the rice should be "warm" and the fish "cold", but yuujirou said rice should be a bit over the room temperature which sounds right to me. 寿司の飯は人肌位で、ネタも冷たくはないけど暖かくも ないって感じでは？ I've never been to a $500 per person kind of Sushi restaurant, but I at least go to $150 per person places all the time.
And It seems like yuujiro has more hands on knowledge on how to make Maki which I don't really consider Sushi, but regardless, I sure can't make neat ones. I need to call my mom for that.
Anyway, if Nori is getting too wet, my guess will be that there is something wrong with the rice. It could be the amount of water (which you really should use a measuring cup) or the vinegar (you need to add just enough amount and fan like crazy while you are doing it) or the temperature, or the nori itself. Without seeing what's going on, it's hard to tell...