This section will be filled in once the next version of Mod Organizer 2 - v2.1.6 - is released which includes a seperator framework.
Empty mod folders that MO2 displays greyed out and with cursive font were previously used as dividers.
18.2 Mod Order
Check the mod order page here and sort your own left pane in Mod Organizer 2 to match it. This is not optional.