I've seen 214's that were missing stuff. (Hell, I have one) I'd be kinda surprised if you could talk an admin puke into adding a Silver Star without some kind of paperwork to prove it.
Either way, at this point I'm kinda meh. Awards are *expletive deleted*ed up DOD wide, given out as participation trophies, and generally stupid. Chris strikes me (from his book, and guys that knew him) as not all that worried about it, and he apparently had a 214 that backs up what he said in his book. Good enough for me.
Besides, he's dead. Not like it really matters now.