Playlist limited to 10 images?

I have 3 of the MC II.  I have a separate playlists for each canvas ranging from 50 to 80 images.  I was getting annoyed that they only seemed to cycle through the most recent uploaded images even though they were set to "image shuffle".  

Tonight I decided to turn off Image Shuffle to see if it would play through the entire playlist.  I stumbled upon the "Manage Playlist" function.... Oh cool, I control the order they are played in.

Oh wait, there are only 10 images in here to manage, that explains why I'm only seeing the same few images over and over.

How can I expand this to include all the images in a play list?