The stock Flirc profile for Harmony must be misaligned as I get this too. The default is no power settings at all on Flirc/Kodi profile with "power off" being the only command. If you change the power profile in Harmony to use this by putting the system into suspend (via Kodi settings power off = suspend) it doesn't work, it will always wake the system no matter what you select on the remote. If you don't use the built in power off command in the Harmony Flirc profile and instead do as you suggest by setting power off = number 0 then set this to Ctrl+End in Flirc software the system works as e