EBOM 2009, EAc4 - LEED Form Calculations for On-site?

This question is in regards to the LEED online form for SSc4 in EBOM 2009. We have selected the option to calculate for "On-Site" renewable energy. The calculator is calculating our "Percentage Renewable Achievement" much higher than what our actual on-site percentage is and we are confused/ would like to know more about how the calculator reaches its final percentage. For reference, our designated inputs are as follows: Annual Site Energy Usage: 337.11 mBTU Performance Period: 3 months equating to a prorated mBTU of 84.28 System Type: PV Amount of Energy Generted during PP (2.2%): 543 kWh The calculations come out to: 1.85 mBTU amount of renewable energy per PP (seem correct) and a Percentage Renewable Achievement of 8.78% (seems too high, how does the calculator get the 8.78%??) Thanks for any input!