I dont understand, i've tried removing all info for collision in the units definition, also tried many different collision setting but its always the same ingame.
with collision settings:
http://img.photobucket.com/albums/v162/Infidel/Stranded%202%20dev/screen_00001-1.jpg
without collision settings:
http://img.photobucket.com/albums/v162/Infidel/Stranded%202%20dev/screen_00003.jpg