Updating my payment informations

Hello ! 

I would like to know if Apple will automatically switch between different credit cards when the one holding my subscriptions is expired ? 

I was not able to delete the expired one precisely because there are subscriptions on it and it was impossible to simply update it since my new CC has different numbers.

So I just added my new credit card as a third payment method and place it above the old one on the menu. 

Below this menu, there is the message « If your default payment method cannot be charged for a purchase, including subscriptions, you authorise Apple to attempt to charge your other payment methods in order from top to bottom » but i want to be sure about it in order not to loose my AM playlists for example. 

Thank you ! 

PS : please tell if my question is not clear or if the topic is wrong