bear with me, i dont really know how a RR works BUT what if the prosport measures whp aswell as flywheel and the RR tech guy clicked on whp on his comp, thats why it printed out?? if this doesnt make sence then feel free to shoot me down 
maybe joe...and you cant be shot down for asking questions

The RR can only measure wheel hp directly, then calculate transmission losses on the coastdown.
The difference is added back to get 'estimated' flywheel hp.
from what Peter said the torque value is calculated from that using the revs
Traditionally the older 'braked' dynos gave a @ wheels figure only , but they can be very hard on a car.
fyi stage 1 APR = 22 psi peak! dropping to 15-17psi sustained
fyi the dogbone is the dogs
