Learning Mastery Column Order - How can I make it STAY in the order I put it in?

[The_Pasta]

I cannot figure out how they are ordered.  (They are not alphabetical).  They do not have due dates.

When I reorder them, I get them set up how I want.  When I return to the page all my changes are lost.

I feel like this must be obvious, and I am missing it.