Becoming Prophet = New Sprite/Monster Nbr?

[zepath]

I've never encountered this before. When playing as EA C'tis I promoted a Lizard King to become my prophet and, strangely, his sprite changed as a result. Instead of using the newer, high-res sprite of the Lizard King (monster number 177), as a prophet he now has an older (or at least lower-res) sprite and is apparently now monster number 328. I've never seen a commander change sprites or monster numbers in the process of becoming a prophet before... Is it intentional or perhaps some strange glitch? Does anyone know of other commanders that also "transform" when becoming prophets?