Yesterday I created a sample course and I want to scaffold out the units & pages. I had added 2 units each with one page, and they were visible on the course details page because I checked "Show the Course Overview structure and Preview Options".
Today I was trying to add more units & pages and getting frustrated that they weren't showing up on the course details page. I looked everywhere to ensure that all the publish switches were active, but still couldn't see them.
Eventually I tried checking/unchecking the "Show the Course Overview structure and Preview Options" options on Step 2 of the course. That worked. I am now able to see my unit/page updates.
Is that required any time I add new units/pages? I would think if they are active, they should just appear without having to do that.