'Unfair' siege towers. (BI)

[Ummagumma]

I just noticed something when playing Barbarian Invasion. When I fight off a siege the AI siege towers will pepper my wall defenders with arrows from the top of the tower. However, when I use towers myself the archers that are supposed to be there are off sleeping in some nearby grove. This is every single time. The AI attacks, the tower will rain death on my defenders, I attack and they will not shoot anything.

At first I thought it could be due to the troop type operating the tower, but I started new campaigns, using the same troop type and the same tower type (attacking the same wall defence level) but still my own towers have no archers in them.

Does anyone know a reason for this? is there some text file that could be changed to level it out (so that either both of us get the free archers, or neither of us does).

[guyyug]

units carrying seige towers have an option to turn fire at will on, turn it on and the tower will shoot at the defenders

[Ummagumma]

I would like to nominate myself for the award of 'Forum abuse through not paying sufficient attention'.
Thank you. I just didn't see it.