Can’t get more than 10 Video Thumbnails in Gallery

Great plugin and have been using it for a long time on single videos. However, I now need to use it for galleries and whilst it seems to work ok I cannot get it to display more than 10 video thumbnails. I have it set to 30 in the settings but it makes no difference. I have also checked it in different browsers just in case I was seeing a cached result but it is the same. At the moment there are 13 videos in the playlist the plugin links to.

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