XBox Game Pass Ultimate? - 6

My family shares an XBox (different accounts) and we have had it for a relatively long time. So I know when someone buys XBox Ultimate, any account can use it.

Now it is like this: 3 of these accounts had not yet used this trial subscription. That's why we bought vouchers at MMOGA and applied them to these 3 different accounts. But now it says for every account that the subscription will expire after 13 days.

My question now is: doesn't this pile up because we applied it to different accounts? I mean, with normal subscriptions, it wouldn't accumulate if it was used on different accounts. Can I then write to Microsoft and complain if that is the case?

3 different accounts, so the time is logically not staggered and it remains for a total of 14 days. You can't complain about that either.