[Edi]

Soapyfrog, that seems like a variation of an older known bug. Every unit in every game has an ID number that the game uses to determine who goes first in battle, for example. When units die, their IDs become available for reassignment again. If a summoned unit gets the ID of a commander that died the same turn, they also "steal" the magic paths of the commander whose ID they got. I was very, very mystified by a S3B3 Shadow that just appeared in my commader lists in a SG Ermor SP game.

If somebody had two VLs whacked on the same turn, there's your explanation, and it would also indicate that the bug has not been fixed. Might also be that it cannot be fixed at all without breaking immortality.

The Arch Devil is more interesting, to date I'm not aware that anybody has reported a problem like this.

Edi