Hello @MartyDoucet 

I understand you are seeing Course tabs moved after having organized them and I want to help.

Have you favorited those Courses at all via the Courses tab? It is right beneath the Dashboard tab on the left. From there, go to All Courses. Here you will find a list of your active and past enrollments. From there you can to star the courses to show on your Dashboard. When starred they should show not be able to be moved and should be removed once completed. I believe, if you haven't favorited any, that would be why if the tiles are changing their placements.

I would first try favoriting those courses for them to show. We can also change the color, and nickname of the courses once they are showing how you would like. Here is a reference if needed:

https://community.canvaslms.com/t5/Student-Guide/How-do-I-view-all-my-Canvas-courses-as-a-student/ta...

Hope this helps!