Khan Acadamy app issue

[Fizyx]

Wasn't sure where to post this since it's an issue with the app and µTorrent as a whole.

So the issue is that I am attempting to grab all the playlists from the app so that I can seed the entire thing as best I can (it's one of the only ways I can support the fantastic work that the Khan Acadamy is putting out.) However, over the course of trying to grab all the playlists, I noticed that playlists 4 and 18 under math (Singapore Math and Differential Equations, respectively) will not load. When I click the 'Download Playlist' button, it turns into 'Adding', and remains there until a different window is selected in µTorrent, then reverts back to the 'Download Playlist' button. I am not sure if this is due to the fact that I grabbed all the playlists (the other 39 worked fine), or if there is an issue with those two playlists.

Again, sorry if this is in the wrong section of the forums

EDIT: After finishing all the other playlists and stopping them, I tried again to access the playlists in question, both through the page listing the videos in the playlist, and by the link in each individual video. In neither case did it work, leading me to believe that it's probably a problem with the individual playlists and not with having all of them torrented at the same time. All of this was tried on fresh start of µTorrent after a reboot of the computer.