Note that the index of the touch is related to simultaneous touches. That is, if I touch with 3 fingers they'd be 0, 1 and 2, according to the order of touch. If I touch with one finger again and again all those touches would be index 0.
Also, "Has Nth Touch" doesn't work as you think it does. This condition is true if that specific touch index is active.
For example, having these two events:
On touched <object>
Has touch 3
means that this is only true if the object is touched AND there are 4 touches active on the screen (0,1,2,3).
What you wish, I believe, is:
On touch 0 start
Is touching <object>
Which means that it's true only for the first touch (no multitouches) and if this touch is touching that specific object.