When a Folder is assigned a Category, all media inside that folder WILL INHERIT that Category.
In the People view or Albums view, when a person or album is assigned a Category, the images in that container DO NOT INHERIT the Category.
Disable Inherited Categories for Folders
A folder’s content automatically inherits any category assigned to the folder by default. However, you can turn off this feature if you wish.
Click Folders icon in the left sidebar and select a Folder.
Click the info icon at the top of the right sidebar to access the Info Panel.
In the Categories section, toggle the switch next to File Inheritance to the OFF position.