Having worked on JP's lists I have the following.
The Main list is at 8222- so that is created by going to
CREATE NEW RESOURCE , give it a title and from RESOURCE TYPE choose LIST,
also PUBLISHED remember to Save Resoutce at SUBMIT CHANGES/UPDATE RESOURCE
then go to NEW EDITOR to start forming new list. (make a note of ID)
Open a new Nrich tab in order to create a new item that will give you some words at the top of the "list" when it is displayed.
So to get a few words at the top we have to create a new resource. Do that as usual [make a note of what you TITLE it **] but choose EMBEDDED from the RESOURCE TYPE menu, PUBLISH & SAVE, Then go to NEW EDITOR to be able to write the heading/paragraph you may need.
See 8209 in JP's example.
Go back to You list which you have in LIST EDITOR mode. [eg 8222]
Insert at HEADER the title you gave at **
If you are just listing tasks then insert their ID's at RULES
If the order that they appear is important then add them in that order., then
at ORDER choose AS LISTED
S A V E .
PS.
If you are adding Lists as well as tasks then create them as above, making sure everying is in PUBLISHED mode [eg. 8223]
Then add theiir ID as you do for tasks in the main [parent] List.