I do agree, and that's why I only made him a very simple, surface understanding of double entry accounting. That there are 2 entries per transaction. I didn't give him an insight into assets, liabilities, and equity, scrubbing, forecasting, and a whole bunch of more complex accounting concepts that stem from double entry book keeping. Also, the cipher part... I just said he noticed patterns such as characters being repeated. So that he can identify that the transactions are being entered twice. So, he esstentially only did two things. One is see that the cipher repeats per line. Two is see that the double entry makes it twice as had to make an error. 

But I will go ahead and make the changes as soon as possible if you really think that it is abnormal.