mcbee, the P/L is calculated with the market's commission rate in mind. I wonder what happens if it is different from the actual commission BetFair charges you based on your location.
Is the market commission somehow overruled if your personal commission has a higher rate?
Interestingly, there is such thing as a "user discount" which implies you may have the base market commission discounted, i.e. lessened, but not sure it applies the other way round when the commission is in fact increased.