I'm trying to achieve something that sounds pretty easy to understand, but... whatever I do, it doesn't work. Let me explain it :
In my archive template, I want to display the name of the current category. That's easy and I can do that.
But I also want to display the parent category name, if there's one.
And... I don't want to display the category name twice when the current category is a top level one.
Thanks a lot for your help !