well, controlling up to 16 units at once can be a little confusing at first - though I'm a virtual newbie to any sort of strategy, or even video/PC game (the last one I had bought was SSI's 'Eye of the Beholder' that must be close to 8-10 years ago...)

However, if you take it slowly, it will come. I learned to pause mid-battle on occasion to survey my troops. And example would be that often, if you don't keep track of a unit, it could run to the edge of the map chasing down an enemy unit that is routing. Or, if you try to send a 'down' unit off the board (you need to exchange units for reinforcements, unless a unit is completely wiped out)- it may sometimes stop and attempt to rally on its own. (a down unit would be one that is exhausted, or has suffered heavy casualties - a unit of 100 spearmen is now 12)