Last modified: 2011-03-13 18:05:34 UTC
If you put a category inside itself, CategoryTree shows it as an infinite level of subcategories, all with the same name. It would be ideal to not show the subcategory if it is itself.
If you put a category into itself, you broke your category structure. Don't do that, it makes no sense. CategoryTree will show whatever the structure is.
CategoryTree could in theory detect and ignore this type of direct "loop", but it can't efficiently detect larger cycles like A -> B, B -> A, so it would be pretty pointless anyway.