I can't import addons and use them!

I’m just trying to import addons but the importing text on the top of the screen doesn’t show! It gets imported but I can’t use it! In the addon screen of the orld and “Global Packs” in the settings doesn’t show the addons! Just that from the Marketplace! Mojang, is this a trick that we buy more addons from the Marketplace or is this a bug? When you don’t answer, you will get very suspicious on my eyes.