Thanks for that info. I'm currently setting up '3' Odroid-C2 units, and ran into the 'duplicate button response' (which turns out to have been a 'triple' since I also plugged in a USB-MCE-IR-Receiver).
Didn't know there was such 'flexibility' in the configuration, and am glad I was able to disable the 'TV off' functionality, as it grew tiresome to have to keep turning it back on...
And, was concerned that the 'built-in' IR receiver on the Odroid card wouldn't be 'visible' and hence 'unresponsive' to button pushes, but with CEC forwarding the commands via the TV's IR receiver, this makes the placement of the Odroid inconsequential (except for WiFi receptivity issues).
ALSO, currently using LE 9.0.2 which some have stated the 9.x versions broke at least some of the CEC functions, which 'I' haven't encountered... (yet ?)