One of the things most people probably don't realise is that Spelling, Gramatical and Typographical errors are actually COMMON in written published material, even where the writers come from an English Language background. Even in Language textbooks there are errors.
Its a GAME you bought, NOT a book. I almost wish Mongoose never picked up the B5 licence (being a Judge Dredd Player, its hardly helped that licence get new product). What would you prefer, more games designers or editors working on a product. Because at the end of the day you will be the ones paying for their time.