No, that's not normal. So you're saying that you don't hear anything with the pulse width sliders in the middle? Do you only hear something on one side, but the other side of the range is completely dead That could be a problem in the sliders, the ADC that measures them, or the auto-tune miscalibrating the pulse width.

Exactly. After you press A-1 (which is the saw tooth test sample) with the sliders already set to the middle, then press the Pulse buttons on both OSC A and OSC B the sound goes away.  I think they make sound at the edges, but I'm not positive about that. The behavior was different from the manual, but we didn't know for sure we were doing things correctly.