I decided to try out a Horselord hero for fun in a game I am winning handily. I recently bought the +3 group move skill. A couple of turns later I was offered another hero (Assassin) nearby. I grouped the 2 heroes together and now I am getting what looks like +6 group move per turn (the Medusas that came with the Assassin now all move 18 per turn and the Yeti's are moving 22).
It appears a 2nd hero in the stack is causing the game to give +3 group move twice. Since I like this *feature*, maybe I shouldn't have reported it

KGB