Andy, what you're saying makes perfect sense.
Unfortunately, the standard is still pretty explicit: "Auditors shall not audit their own work."

Surely in a small organization the one-man quality gang will end up verifying that procedures which he has written conform to the requirements of the standard. Such a situation would seem nonconforming, according to a strict interpretation. Or did I miss something?
Interestingly, ISO 17025 says something like, "Where practicable, auditors shall not audit their own work." Much better, to my mind.