[Blofeld]

[img]/threads/images/Graemlins/Bug.gif[/img] siege calculations seem to be bugged

My fort was unsuccessfully stormed, then I've been besieged in a fortified city for like twenty turns. Occasionaly the enemy sends in reinforcements, then "defence left" drops to ca. 160, then during the following turns, although I get the message "our walls are damaged" the "defence left" goes up until I got the message "they can't breach our walls". I've only got 20 soldiers + 70 mindless, no flyers nor defence bonus troops in the fort while the enemy has 120-200 besieging troops and plenty of commanders to lead them.
Either calculations are bugged or the enemy does something strange with besieging troops instead of sieging (no signs of pillaging here).
Savegame attached, if anybody feels like looking into the situation (the siege in Vanheim)