Not wishing to contradict the outpouring of cynicism, which is something I fully endorse after many years in QA ( ), but has no-one else ever experienced the opposite effect from having repeat audits with the same auditor?
If the first audit goes well, you develop a rapport with the auditor, and pass with a very good result, have you never found that when they come back the next year they're somewhat more relaxed, and may be more likely to accept things with a lesser degree of probing?
100%. Rightly or wrongly, it's amazing how many times 'oh yeah that's right you don't do/have x, y and z do you' gets you out of a sticky situation or a difficult and squirmy explanation to a question a first-time visitor would have asked. Furthermore if you can remember how they take their tea before they have to tell you, you're probably halfway there!
In my audit this year I learned rather a lot about Zanzibar after asking her about her travels last year that she'd told me about in the audit before. Small things make a difference!