Question Need two fingers to rotate an object and just one finger is needed

I use something like

if (Input.touchCount>0)
{
Touch touch = Input.GetTouch(0);

switch (touch.phase)
{
case TouchPhase.Began:
break;
case TouchPhase.Moved:
mainCamera.transform.RotateAround(Vector3.zero, Vector3.up, pos.x * 10f);
break;
case TouchPhase.Ended:
break;
}
}

But when i try to rotate the object i realize i need two fingers instead of just one, why this happens?

 

Tried with touchCount == 1 and just works with two fingers, dont understand, if touchCount is 1 why works just with 2 fingers?

 

The first thing I would test is that you see this identical behavior on multiple devices.

 

I am also getting this issue. Using the standard assets touch pad script for camera movement requires two fingers touching the screen instead of one. Changing the touchCount does not fix it.