[KnightFandragon]

Another reason your men will go really slow and sluggishly is because just like in Real Life, they have stamina. If you look at the 2 bars below their picture, red is health, the blue is stamina, when it is empty they will run slowly. After they regen their stamina they will move quickly until it runs out again.

Before trying to select any other unit always make sure you left click and clear your selection box first. Also, if your selecting infantry and you pick another guy and move, you may at times find the whole squad moving...you must make sure he is not a Squad leader(Has yellow triangle under him). This will move the entire squad to the Squad leader.