I decided to play around with the Reading Plan and see if I could make it work. I chose the latest (free) edition of Themelios to read. In the Passages box, I broke the journal down into page sections based on where the articles started and stopped. My page sections look like this:
1-4,5-7,8,9-16,17,18-25,26-28,29-36,37-45,46-52,53-63,64-69
I input this info, and L5 seemed to take it in stride. Here's what the thing is saying back to me:

Since there are 12 different 'sections' in my list, I chose to cover this in 12 sessions, as shown.
However, when I generated the reading plan, L5 completely ignored my sections, as can bee seen in the calendar view:

This can't be that hard.
????