Our auditor and CB are the same organization. Somehow, that doesn't seem right to me either.
This is a registration auditor? If so, he would be an employee or contractor of a Certifying Body - a CB. His business card might show their name.
To summarize:
As registration auditors, per the rules we don't get to say "You must use travelers/you must have handwritten signatures" unless it is because your manual/policies/procedures say you do, and/or unless it's required by a customer, a body such FDA or as Underwriters Laboratories (test data documentation expectations can get specific). That said, 7.5.1 does require controlled conditions so I would ask some tough questions if no instructions were available to production personnel because they were still going through approval.
You have the right to dispute a CB auditor's nonconformance but it must be done very soon after the audit ends and you need to be ready to present your logical, standard-based and data-supported case.
It would be nice to learn what you end up with. Please come back and tell us, okay?