Sometimes when content from a prior course is imported into a new course, sections of content seem to disappear. These are “orphaned sections,” and they occur when you have fewer sections available in your new course than were in the old course. To see these orphaned sections, click Turn editing on on the main course page.
Scroll down to the bottom of the page and make note of how many sections are needed. Then, click on Edit Settings under the Administration panel on the left side of the page.
Click on the Course Format section, and under “Number of Sections”, select your desired number of sections.
Make sure to click Save changes when you are finished.