1. I rewatched the episode. Vaughn asks "Langley?" and Dixon then says no, they were in the Corps together. (The Marine Corps, I take it.) So it's okay.

2. Precisely.

Tentacle Porn: He. Well, you know, the variety I go for is rather show-specific. Because JMS, bless him, went to some length to make the sexuality of several alien species truly alien, and thus the Centauri on Babylon 5 don't have one bit of male genetalia, they have six. Tentacles. Which we see on screen on two occasions, American censors being a bit obtuse.*veg* (The Centauri women have six slots on their backs, if you're curious.)