DEMI transverter IF input power level

Hello! I have a DEMI L432-28HP UHF transverter with 10m IF which I am using as part of a Flex-6700 full duplex Mode J/Mode B satellite setup. I have a question regarding the "Max Power (dBm)" parameter on the XVTR tab under Settings/Radio Setup. From what I understand, according to page 107 of the SmartSDR user manual, this number should be the IF input power level to the transverter, in dBm, which produces the maximum nominal output power of the transverter, in my case 50W. To establish this value, I have done some measurements to correlate the reading on the Tune Power slider in SmartSDR (0-100) with the IF output power of the XVTR port of the Flex, and the the output power of the transverter. According to my measurements, when the power slider is at 100, an IF level of -14.2 dBm produces 47 dBm or 50.12W output. Now, when I try to enter this -14.2 dBm into the "Max Power (dBm)" SmartSDR overwrites my entry to -10 dBm. Is there anything I can do to be able to enter the correct value? 73 Levente VE7BDK