Totally strange, i am using the standard "7 Power Zones" config on my Edge 830, but from time to time, when i look in the Power Zones configuration it changed without any interaction to "9 Coggan iLevels"
i found an article when you want to use this Zones when you are working with WKO (Screenshots included):
But i don't want to use this option, why it is changing secretly without any interaction of me?