Why won't my Ipod Touch upload all my Youtube videos?

I’ve been able to upload my videos from my Youtube playlists to my Ipod Touch using iTubelist just fine. However…

This time, when I try and add a playlist my iTouch tells me there’s only 1 video in the playlist when there should be 13. Only one video clip shows up.

Why is this and how do I fix it? I haven’t updated the iTubelist app so it’s working in that regard.