Tilted Axis map script icon is inverted

[GAGA Extrem]

The description states that the north is dark and the south is on the daylight side, while the icon shows it the other way around.

Screenschot:

 

[Monado]

Maybe the light part is supposed to represent the ice, which dominates the northern part of those maps.

(I just finished a playthrough on one, real fun map script.)