Light Infantry commander? Bug?

[Duncanish]

I'm playing as Caelum in an ongoing PbEM game. We recently had to redo a turn due to a mix up. After going in to re-issue my orders, I notice an extra commander at my home province. I check his stats, and can clearly see that it's a Caelian Light Infantry, waiting for orders. It's still early in the game, and there's no chance I GoR'd it and simply forgot. Has anyone else had anything like this happen? A normally weak trooper suddenly gaining the backbone to say, "Okay troops, follow me!" Sounds buggy...