Apparently the Gummint in 1947 couldn't find one proof reader they could give clearance to.
One would assume that someone as aware of the military as you seem to be would realize that errors in English and spelling have been fairly common in government communications over the decades. Some folks are good at it and some are not.
I proof-read lots of traffic at one Radioman’s job . . . for proper routing etc. Often a lot of the English was overly cryptic; poorly written; and sometimes silly, vain, obtuse, and/or incomprehensible.