Indeed, we will never see him sign the SF 180; there are too many strange items.
However, we still do not have conclusive proof. Indeed, your post supports the possibility that after 6 years of IRR he was discharged.
BTW, it's been a few years. What are the MOS's : 2571/2577/2578 ?
Semper Fi
USMCR '82 - '96; Gulf War '90-'91
0311 / 0321 / 8556 / 0300
I don't know what they are now, but back then:
2571: Special Radio Operator (R)
2577: Special Radio Operator (T)
2578: Electronic Warfare Operator
I was working in the Naval Security Group.
Semper Fi