All things considered, with Kaidan being a Spectre (which Shepard may or may not also be in ME3), he's probably not completely bound by any orders given by Shepard regardless of rank.
That said though, we've had soldiers salute with the wrong hand, a not entirely accurate SOS and a couple of other small mistakes from the military viewpoint. Unless this is specifically addressed during the game in some manner (outside of the codex, which I don't put 100% faith in), I'm willing to suspend disbelief and go with the flow... especially since Commander does outrank Major in the real world - least, i think someone said that, i don't know, never been there myself.
Edit: Something else just hit me... I'm not sure exactly how it works, but if becoming a Spectre makes one no longer a member of the Systems Alliance, and Shepard is reinstated to the Systems Alliance (again, not sure how this works exactly)... wouldn't that make Shepard in charge anyway since the SR-2 is now a Systems Alliance ship? I mean, they didn't have to give Shepard the Normandy SR-1 in ME1, it was a decision made since a Spectre needs a ship, right?
Now I'm overthinking this...
Modifié par Kasen13, 05 janvier 2012 - 05:20 .