Hi John, I got a first reply from Simon, shown below:
"...... Hi Francois,
I checked and the generator lights and amps meter functions like that in the FSX default aircraft equipped with radial engines.
Then yes the gentleman is correct regarding the lights label! oops!...I will also update the relevant texture to correct this.
Kind regards
Simon.... ".
So I guess it may be a fault, but then it is a fault of FSX currently...... I still have to send him your other remarks..... somehow that mal didn't go out ! Sorry !
Kind regards,
Francois