Look at tiny Fahey. Look at his giant, adorable head. You think he’s worried about where his pants are? He probably is, and that just makes him even more adorable. I can’t even handle tiny Fahey. I just can’t.

Is this really a glitch? In your inventory, you start with 76 .308 rounds. After you confirm the trade and have sold your ‘phantom’ rounds your initial stash of 76 .308 rounds drops to 22. It seems to me that you just sold from your inventory.