Oh that's weird.
When you say they do not have unique numbers are you talking about the bar code or the pin code? The bar code numbers should stay the same for the same q. The pin code should change. If the pin code is the same, you are correct. One time use. As far as the q's that were supposed to come after that....I dunno what to tell ya.
Retry on a different puter?
Pin code was the same.. Its weird how they kept printing. I just deleted it from my printer cache. I guess out of luck on the others since they would not print.