Ok, I think I may have encountered another Zeigfried issue (am in Junon). He summons Odin as he's supposed to, but it targets the party instead of Zeigfried. The reason I bring this up is because his dialogue text (after summoning Odin) then talks about how he's now a spooky ghost, before then (finally) admitting defeat. Only issue is that the player party just got killed by Odin. So either the targetting is off there with Odin's attack, or the dialogue needs changed.
EDIT; Also, it seems I figured out how to replicate the Zeigfried having no MP issue/glitch I had brought up before. Basically, anytime you fight Zeigfriend, regardless of whether you win or lose, and then you quit the game without saving? The next time you start the game and Zeigfried shows up, he lacks MP.
This just happened to me after I had shut down the game to report the Odin-targetting issue I had spotted.