Any business that doesn't do regular sales reports, and has a AR period aging on a regular basis to not only review for any mishaps but to have an idea what sales are doing should go back to pen and paper. Even Quick Books will do this. Even if you didn't know that all these confirmations were being sent out, wouldn't you see the need to revamp if you saw your sales go up double or more on the reports? I see it as a human mistake, not as a software upgrade issue. I work as an IT director for a Manufacturing company, even with all the advanced resource management software in place, we still have humans evaluate orders because the computer can not always determine what will be needed when, and what can be moved around.