torque voltage correlation

BrianG on that link http://scriptasylum.com/rc_speed/_power.html if you fill in the blanks for example 11.1V, 5000mah, 20minute and calculate the current and power. Under the results of the calculation stays mah values for higher voltage for the same run time and this mah values are lower on higher voltage. That means on higher voltage current will decrase.
Which is wrong? you or you calculator