Touché arduino multiple fingers detection

Hey guys! so, started to explore de SFCS based on touché by disney... right know im using these.... https://github.com/madlabdk/touche...
i pretend to have nice and distinguised values between diferent fingers... (what happens now is that when i make the learning for 2 fingers, as the values are quite close to the "1" finger, the tracking gets confused...
is there a way to make it more precise and to get computer to really understand the onset for each finger? how can i work with the whole spectrum?... and not only with the peak or something? im using arduino and max via serial. how can i change the code to have a better output from arduino?

thanks in advance!
Tiago