Stash page gone?

So i'm pretty new to path of exile 2, never played the first one but i'm enjoying it a lot, recently i bought the stash package which gives me multiple pages n stuff, but first of all some pages are remove-only? cant i use all of those pages on multiple classes? and now i checked and one of my currency tabs which was marked with remove only is just completely gone, i still have some with remove only but not that one?