Welcome to the "Airbus philosophy". The French don't even know how to number pages. They number them often with letters. But unfortunately they have not realized there is only so many letters in alphabet as opposed to numbers. I have been on airbus for 8 years and the manuals are getting worse and worse. Many mistakes in them too. Yes in our company we have many MSN numbers, but it get easier if you use electronic FCOM. I also agree that Boeing manuals are much better and more common sense.
It is unfortunate. Airbus is a great aircraft. But the manuals and the training department is a different story. They should subcontract all that to the Americans (by the way I am from Europe).