Muppethead, do you really believe your daily newspaper to be free of spelling and grammar errors? Your standards in those areas can't be very demanding then....
Newspapers and magazines, notwithstanding my little dig, can afford to have high production standards because of their relatively huge income from both advertising and circulation, and the fact that their staff are employed full time solely to produce that publication. That is not the case with the study notes of any educational institution, with perhaps the sole exception of the Open University.
Amendments to manuals are something you're just going to have to get used to in aviation. You'll be doing them, or at least receiving new CD-ROMs, every few months for the rest of your flying career. Corrections of past errors of English with further errors of English are par for the course. You're lucky - at least your manuals are produced by English speakers. Try dealing with Airbus manuals! And, while we're at it, my manuals for the A340 cost my company a great deal more than what you paid for yours from Oxford.
As Oxford Blue says, if you find genuine errors, report them to the staff. If you're just having a general moan because you had a bad day, let's hope you're not identifiable!
Scroggs