It's ok now. Crash helped me out in the Kali General Use section, to install the **** thing, because after 24hrs of reading and trying different things I was about ready to blow a gasket...
Now that I got it installed, I beg to differ, and think something might be outta wack > FS/RC3 .
I will do more test with 3 different KL installations and comeback with a more comprehensive explanation, but for now I can tell you that when choosing an AP that is Pixie vulnerable and attacking it with the Pixie attack, the next time that the same AP is chosen, FS automatically attacks it with the Handshake, without any other attack possibility.
Moreover the scan results are somewhat messed up, but only for that AP, where instead of showing signal strength, it says "OPEN", which it is not.
Don't unbolt it yet until confirmation from someone else. I would hate to go onto another ghost hunt