The software includes the “Welcome and Instructions,” the glossary etc. at the beginning of the online courses as Lessons, since they are webpages built into the course. So there are actual teaching lessons and also other pages which are important to the course, but they’re not lessons in the true sense of the word.
The progress bar won’t show the course as 100% complete until the “Complete” button has been clicked on at the bottom of these first pages and all quizzes have been passed.