why is it when I click the "required items" it doesn't show what I still need ?

Helpppppppp :)

Have you visited your sticker collection page? Normally the achievements to show what you are missing or to gain the achievements don't update until you visit that page.

Yes I have...several times and in every way I can think of:

by clicking when a sticker gets added by a friend through the games-collections link and from my profile where it says view stickers

no luck :(