Correct. When switched to "0", MyKey was no longer an option & had no restrictions. Back to "1" and it added MyKey back as if it never had MyKey activated.What you did was you turned off the feature (not all trims had MyKey). Which clears the MyKey restrictions for your specific key. If I understand correctly, once you turned it back on the restrictions remained removed?
All Focccus does is rewrite the Central Car Config which pushes options out to various modules. Thankfully Ford has moved away from this, instead storing the settings independently in each module in newer car lines.
I don't like CCC and try not to mess with it even with dealer tools. On later cars it's not a concern because you can only flub up the specific module you edit, not the whole car.