I haven't logged in to see if its real, I may not be able to see even if it was. As for formatting this isn't a memorandum for record. It doesn't need to be dated. The format is correct for some memos, you can't compare it to a memo for record. Check out DoDM 5110.04

My person though is that it appears real, but it was likely ment as a LIMDIS document (meaning limited distribution) and it got leaked.