Posts not appearing in the category they are set in.

Hi, I am very new with blogging, and IT in general so pleas bear with me and help me.
I am writing a blog that I still haven’t publish. The posts that I have set in the category appear in almost every category that I have set.

As it shows, the blog is set in category “Germany”, but when I open category Australia, the post still appears there.
Please help me fix it.

Are you writing your own Blog in Wix Code? If not, and you are using the Wix Blog app, note that this forum is dedicated to Wix Code. For questions regarding other features, such as the Wix Blog, please contact the Wix support team , as they know best.