@skhagen , looks like you stumbled on a bug! I just checked and I'm showing 179 rubrics for every course. Which definitely isn't the case! My recommendation - and what I'm doing - is to submit a Help ticket to Canvas support!
Side note - I also turned off the "Find Rubric Sorter" Canvancement and still had this issue - Sorting the Find a Rubric dialog - so I don't believe it has anything to do with the issue.
Update, my case is 03171900 if anyone wants to reference it if they are submitting a ticket for this.
Had to check..............
I am also showing 179 rubrics for every course.
I am suspecting that this functionality might be broken.
As an update, here's what I heard back from Support:
Thank you for contacting our support team. I am sorry to hear that you are experiencing an issue with rubrics. Our team just recently became aware if this issue and we are currently investigating this further. We will reach out back as soon as we have additional information in regard to this issue.