Please, get focus straight and take a decision to either remove the flirc Natvie Kodi profile in Harmony, or update it on the Harmony side as well as in the firmware. This is a joke as it is now and nothing happens, I have actually offered me to help out if possible - no response what so ever.
Regarding your last question; it's actualy Jason who has set it up as this in Harmony, don't blame me. However, I think it's the right choice of button to map.