It would be more forgiving if you added a "restart" button for when the volunteer is uploading the recordings.   I had made a set of recordings, then press upload, but needed to refresh my internet connection.  The upload was stalled, so I tried to reload the web page, and the result was a previous page that I had used. That's a problem.  So to correct it I had to navigate back to your home page, then to the page to submit recordings, and the java applet ddin't see the old recordings anymore, and so I had to re-create them all, a real nusance.