Character controller Skin width no effect

Hey guys, i'm using the character controller component like this : http://i.imgur.com/2D419qT.png

Both units are the same, with a huge skin width, but when I move them they just Superimpose on each other.

Here the movement script : Vector3 travelDestination; bool hasDestination = false;

 // Update is called once per frame
 void Update () {
     if (hasDestination)
     {
         Vector3 newPosition = Vector3.MoveTowards(this.transform.position, travelDestination, 0.1f);
         newPosition.y = Terrain.activeTerrain.SampleHeight(newPosition) +0.2f;
         this.transform.position = newPosition;
         if (Vector3.Distance(this.transform.position, travelDestination) < Vector3.kEpsilon){
             hasDestination = false;
         }
     }
 }

 public void setDestination(Vector3 point)
 {
     hasDestination = true;
     travelDestination = point;
 }

Would you know why my units don't care abotu each other ? Am I supposed to code something ? Thank you