And the dogtags; I originally thought they were talking about Rodney wearing John's, except the timeline was wrong for that, too, but argh. I am so overthinking.
Yes! I thought that when that scientist (Bender) mentioned Rodney wearing dogtags, they were John's (which would also explain Rodney blushing), but John only gave them to him before the wedding, which is after the first wave of people left. At first I thought that maybe Bender was one of the six diplomats from operation Snow White, but he wasn't and yes, confused.

(hope you don't mind me butting in)