Mhmm... the difference is that in that case, those are sub-titles for a
list, not the title of the list. And those are used for separating a long
list. But in this case, we have a lot of different lists (so it can't be
just one huge list), and those are the "names" of the lists, the titles.
Try to think of it semantically, and you'll see that they are two different
things.