Many Mint press releases are superficial as far as numismatic terminology and usage is concerned. Remember that the US Mint was and remains a very insular place, steeped in "secret" knowledge and not comfortable with keeping details of how things were done. Had they been better at keeping engraving notebooks, there would never have been problems with 1936 or 1950 proofs or packaging, among just a few examples. There is also a strong tendency to deny obvious problems, then take destructive actions, and finally admit they made a mistake.