Full Course Listing Doesn't Work

The ability to click on the type of course and go to the full course listing page doesn't seem to be working right now. For example, clicking on "Upper Intermediate" on one of the listings in my "Manage Lessons" tabs tries to take me to the link:

http://chinesepod.com/lessons/all/list/Upper+Intermediate

but this gets redirected to a "page not found" instead. Other course types seem to have the same problem. I hope this gets fixed soon, it's nice to be able to see all the lessons listed together when picking what to study next.