Scale and rotation randomization not working in the unity 5 terrain tool when painting trees

It would really help me out if you guys could figure out a way to fix my issue I've been trying for ages. i can paint my trees onto the unity 5 terrain but the randomization in scale,rotation and color don't change even when I've got them set to do so( to the right in image). you can see its working for the billboard effect but not the actual models...I'm using blender and exporting as fbx with transforms applied