Random lessons mark themselves as uncompleted

I have been having random lessons in the Responsive Web Design section mark themselves as incomplete. I thought this issue would disappear when I claimed the certification, but now, a week or so after completing that cert, I have one lesson on 97% complete with an already claimed certification.

Has anyone else experienced lessons resetting?

Welcome to the forum @ericfassbender

Sometimes the steps in the practice projects are updated.

Either the step is reworded, or a step is added or removed.
When a new step is added, a previously completed course may appear as incomplete.

Only the five certification projects count towards the certificate.

You do not need to complete any previously completed practice projects, as they do not count towards the certificate.

Happy coding