Auto generate subaddress turned off result in three addresses
I have turned on the auto generate subaddress option, and then turned it off. Now I can see in Address Book that there is a new wallet in My Wallets section, is this the newly generated sub? If it is the case, maybe it should be marked as "auto generated one"? However, with auto generate on, there are no subs listed in Address Book at all... 

If I am using the auto generate sub option would I still be able to safely use my old "main sub" address? I have it saved in one of the apps that I often use. Or do I need to change it every time?

Monero.com, iOS 15.7, iPhone 7 Plus