Gradebook Grades acting weird
There's a bit of extra information that may help us:

Firstly, when you say "doesn't show up" - that's not very clear. Ideally please paste a screenshot (with names &amp; email addresses redacted).

Secondly, please open "Console" in Google Chrome (or Developer Tools in other browsers) and see whether there are any errors.

Next (if you're on Drupal), please look in your Drupal watchdog for any errors.

Finally, if you have server access, please look in your Apache / Nginx logs and   in your ConfigAndLog CiviCRM error files.

Thanks!