I have a very similar problem:
- 8 students have completed the lesson (I can see that in the course logs) but their attempts are not shown in the lesson report.
- 1 student has not completed the lesson. Her attempt is the only one shown.
- I did have the lesson set as 'practice lesson' but I have now changed that.
- Questions are graded.
- Grade is set to 100.
- I am not using groupings.
- I am using 2.1.2+ (build20111012)
- I have a lesson in another course which does not have that problem, so I'm guessing it must be something related to the lesson configuration.
Any help will be greatly appreciated!