why does it say I have only completed 9 out of 10 lessons when I have done all ten

why does it say I have only completed 9 out of 10 lessons in a module when I have completed all 10?

Hi EdwardS-ckio,

For a lesson to be marked as completed, you need to have the dark green icon on all the reinforcement activities. I have taken a look at your account and in both Module 1 and Module 2, you have one lesson (lesson 1.9 and lesson 2.7) where you have not completed the activities:

Once you have completed these and have the green activity icon, then the lessons will be marked as complete. 

I hope this helps!