I would disagree that every medical check is the same. They have the same instructions and forms, but it's up to the doctor how they actually perform and interpret it. The same circus but different tickets.
Some of the questions are in the form "Have you ever had a headache in your life?" and in some countries they may do preventive healthcare and give you a major operation to avoid headache for good. The form doesn't take this in the account, perhaps because such a preventive health care doesn't exist in NZ yet, and this can result abnormal findings.
I wouldn't be worried about medical advisor unless something serious was found. Think it a super health check that's for your own good. Half of the kiwi population would result abnormal findings.
The doctor should have written the reason for the abnormal finding in the form in any case?