First I would like to say I love this game. I have already played through the north campaign twice and working on the second southern.
My major problem with the game comes whenever I try to move more than one unit. Most of the time, if I select more than one unit and click and drag to move them to a location, the brigades will cross each other and go to any point other than the one closest to them. The larger the maps, the more I have to move men along large areas, the more this becomes a big problem for me. It forces me to move each brigade alone.
I don't know if I am the only one with this problem, but I constantly feel like I am doing something wrong. Did I miss some control button that keeps them in order?