When I take a city, sometimes a fleet appears (a couple of transports) that I guess I happen to capture, but the odd thing is that the fleet takes the name of the formation that captured the city...and that formation changes it´s name to, for example, "french dettachment"
It´s not a big deal since it doesnt affect the gameplay in any way, it is just odd to have the Grand Armee formed by two austrian captured transports!