... so why does MTW penalize you for it?

Situation #1: I take a stack and make a feint for a province to draw off ( or pin down ) some enemy stacks while my real attack goes for another province nearby. The stack that's doing the feint then retreats without fighting. It's likely that the general in charge will get a "hesitant" vice, even if only done once. I disagree with this penalty. However, at least I can put a 0 level commander in charge of the stack, so that one of my good generals does not risk getting this vice.

Situation #2: I use horse archers or other mounted missile troops to harass the enemy. After some time, they tend to rout ( and cannot be rallied ) due to being "disheartend by constant retreat". I've had this happen to full strength units that have taken no casualties, still have 1 or 2 fatigue bars, and have a very good general. Why does the game do this?

Robert