I was going to post this in The Spock's Rank thread, but it was closed for being long dead. So here's a thread for Random TOS stuff
Deltas were all over the map in WNMHGB. Scotty and Kelso (in coral) wear the Science "eye". Dehner, Piper and Sulu (in science blue) wear the Engineering "wrench". Smith is in gold but wears the "wrench."That is my take on the whole "second officer" thing as well. The Captain would be the "first officer" in that vernacular. "Second officer" would mean 2nd in command.
Referenced as "Commander" does not preclude a Lt. Cmdr rank. In TNG, LaForge & Worf are referred to as LT while wearing Junior Lt. Pips, and Data wears Lt. Cmdr pips.
One in universe explanation could be the 2nd in command getting extra braids for some reason.
There were lots of uniform inconsistencies as well.
Wardrobe famously mixed up the Delta insignias in WNMHGB (Mitchell & Denher are switched).
Uhura is in yellow in Corbomite (1st produced after Pilots). Sulu has different jobs. Spock is half "Vulcanian" in early episodes.
