We had out annual TL certification audit and were told that we had been collecting and calculating one of the data sets incorrectly. My issue is we have had the same CB for over 10 years and this was never brought to our attention. Is it wrong to depend on the CB to find these types of issues and what should my company do about this? We are being told that we will have to go back several years and investigate the data, recalculate and re-enter the information. Any advice would be helpful. Can we write a corrective action against the CB for not performing a complete audit?