Its not in alphabetical order of devices, it’s not in most recently used, it’s not in likely order of dropping off the bottom of the list; it looks pretty random.
I would have been dinged for programming anything like that 😢
(Also, where is this post supposed to go? I choose what I think is the best heading, and then the software makes me choose from a list of labels, none of which are relevant 😢)
Set a Payment PIN on your account so that no-one but you can buy memberships on it. Check your bank accounts monthly for any other unexpected payments to Now. That way you can at least nip them in the bud, while you and Now figure out whose fault they are.