Nice to hear Capt Booth is still the same after 10 years. He did mine as well. A proper gent and aviator.
If what you say is true, I don't blame you for being pissed off. If its one of the cases of I have given to many first time passes recently your quite right to go for compensation. Although I would suspect that you will get so far and then it will be decided its between you and the examinor unless they were a staff one.
Although putting to many details on here might not be in your best interests check with your sister.