So I'm playing a Teutonic campaign and I'm chasing down a routing BG (they still have the general) with a fresh Prussian Auxiliary. Now these guys are light missile cavalry and they can't catch up to the Novgorod BG at all. They started a few paces away with the chase and ran them all the way to the end of the map without getting a single one of them!

Are the Russian BG mislabeled as "Heavy Cavalry" and have an increased speed in their stats? Or are the Prussian Auxillary units not light cavalry?