Multitouch sometimes doesn't work properly when fingers are close together.

Hi.

I need to move 2 objects simultaneosuly with Touch, my code it's working fine so far but when I move them with my fingers close together, one of the objects will stop moving on some devices, it's seems like Unity confuses the fingersIDs but I'm not completely sure about that. Here's the code I'm using.

 void Update () {
         if (Input.touchCount > 0) {
             for(int i = 0; i < Input.touchCount; i++) {
 
                 Touch touch = Input.GetTouch(i);
                 fingerID = touch.fingerId;
 
                 Ray ray = Camera.main.ScreenPointToRay(Input.GetTouch(i).position);
                 RaycastHit hit = new RaycastHit();
                 
                 if (touch.phase == TouchPhase.Began) {
                     if (fingerID == 0){
                         if (Physics.Raycast(ray, out hit, maxPickingDistance)) {
                             pickedOb = hit.transform;
                         }
 
                         else pickedOb = null;
                     }
 
                     if (fingerID == 1) {
                         if (Physics.Raycast(ray, out hit, maxPickingDistance)) { 
                             pickedOb2 = hit.transform;
                         }
                         
                         else pickedOb2 = null;
                     }
                 } 
 
                 else if (touch.phase == TouchPhase.Moved) {
 
                     if (fingerID == 0) {
                         if (pickedOb != null && pickedOb.tag == "Player") {
                             pickedOb.transform.position = ray.GetPoint(1f);
                         }
                     }
 
                     if (fingerID == 1) {
                         if (pickedOb2 != null && pickedOb2.tag == "Player") {
                             pickedOb2.transform.position = ray.GetPoint(1f);
                         }
                     }
                 } 
 
                 else if (touch.phase == TouchPhase.Ended) {
                     if (fingerID == 0) {
                         pickedOb = null;
                     }
 
                     if (fingerID == 1) {
                         pickedOb2 = null;
                     }
                 }
             }
         }
     }

Is there anything I could do to prevent this or a better way to write this code? I'm using Unity 4.6

Thank you very much for your help.