Certain Categories not showing posts

This is an odd one…
I’m developing a website for a newspaper (https://www.backtoprint.com/) and have posted several dummy posts for samples.
What’s happening is for certain Categories (News or Sports for instance), nothing appears under that Category page (https://www.backtoprint.com/category/news/) even though the posts are there and setup with the proper Categories, while other Categories show their posts (https://www.backtoprint.com/category/update/).
I’ve gone and changed the permalinks setting and have deleted the .DS_Store files to no avail. This is WordPress 5.0.3. Any ideas?
Many thanks in advance!