Adding Audio on Coursepress page builder not working

Hi there,
I tried to add an audio version (mp3 file) of a video in a course and every time I click SAVE CHANGES the audio disappear. is there a limit for adding sections in a course?

Another little question, what happened with the WPMU Dev Dashboard on Wordpress? although I have the plugin installed it won't appear on my Wordpress Dashboard.

Thanks for your help.