I've figured this out, the mod simply doesn't remember which rules were played last.
Basically, I loaded it to check the reproducibility of a glitch from the game: in the Tower village, Mage Guild 5 was built with Flight; then I rebuilt Mage Guild 4 a couple of times and stopped when I found КЗ from the Dragon Utopia. Here is the kicker - I rebuild Mage Guild 5 and get Flight... Does this mean rebuilding other floors affects which spells drop? Or is it actually a bug?
Red AA password, blue X70 password
P.S. Tried to rebuild Mage Guild 5 immediately after construction - got Flight... During the first rebuild of Mage Guild 4, Water Walking occurred again; what is this? There was no library anywhere in sight.