Don't mean to put you on the defensive, but it does not say "nothing left to process". I wouldn't ask but I'm getting a lot of questions from users about this screen. How about something that says "Upload Complete"?
Maybe I'm missing something, but you keep referencing things like "and then tells you all done", "it says nothing left to process", "and tell them all files have been processed" ---- there no message anywhere on the screen to indicate the upload is complete. All I see is an empty queue and a "Process" and "Reset" button.