One of the things that sometimes trips up people in making course outlines is when they create just one sub-element of an item in the Content or Instructional Methodology section.  For example, you might create something like this:

 

 

In this example, there’s only one entry underneath “Cookies”.  When creating an outline, you would typically resolve this by either adding another type of cookie, or by changing the cookie entry to say, specifically, Chocolate Chip Cookies, an eliminating the (a) underneath.

 

When editing these sections, a Validate link appears at the top of the screen.  You can click on this button to ensure that you haven’t made this sort of an error.