Not a dumb question at all! - it might be that some of the decks were empty.
Which sux, since that´s the evenings set list, and the way I´m programming is to lay out ques in one master deck, then copy cues to the different songs/decks after the rehearsal is over, or even while rehearsal is running.
Which means, I lose a vital part of the work process if Arena crashes, which sometimes happens. Yes, I can copy something into each deck, but that would be a workaround. I don´t like workarounds