re: "The memos indicated that Bush had failed to take a physical as ordered'"
Why would someone need to 'order' a pilot to take a physical? The regs are pretty clear, no medical, no flying. Isn't that a bit like 'ordering' someone to who drives a truck for you to get a driver's license? One reason that comes to mind is that someone wanted to make the case that George Bush refused a direct order. Looks worse on a fake memo than 'Lt. Bush was removed from flying status pending his annual physical.' Just a random thought.
Heck, the military issues written orders for haircuts, making the bed and shining shoes, too. Sheesh, get with it ;-).
The forgery is meant to "fill a gap," wherein the DNC has been asserting that Bush disobeyed an order to get a physical. So, the forgery fills a gap in the "Bush went AWOL" meme.
Similarly, the "favors" memos to file are meant to provide evidence for another DNC lie, that BUsh was "favored" by higher ups due to pressure from powerful friends.