Possible Clues:

• Mistaken about revolutionary duplicating machine, American
• Mistaken and certain to be taken up about early duplicating machine
• Duplicate in certain returns is flawed
• Sure or otherwise, one will be put in the wrong
• Wrong one, or sure to be replaced
• Endlessly merry, one of us ignoring fine? That's not right
• It's not right to let our Ron see differently
• Sounds as if this can never be part of the rite
• Mistaken one - or sure, maybe
• Mistaken - inaccurate