Can't see/find rise course in list

I have access to a rise course, but unless someone sends me a direct link to the course I can't get into it to edit it. It isn't showing up in my list of courses. I could put the course list in alphabetical or by time (and use ctrl+f) to find the course title, but it's invisible. 

What's going on? if this is due to the size of the list (probably 200+ rise courses), then can you make it possible to filter out courses that haven't been placed into folders so we can a) find these unfoldered courses, b) put them in folders?