How does watch work ?

Still working on my rotary phone.
For recognizing a simple test should help, thats the idea.

function initWP(){
  var arr = new Uint8Array(100),pnt = 0,pulsePort = D3;
  pulsePort.mode('input_pullup');
  function pulseHnd(e){arr[pnt++] = e.state;}
  function logPulse(){
    console.log(new Uint8Array(arr.buffer,0,pnt));
    clearWatch();
  }
  setWatch(pulseHnd,pulsePort,{repeat:true,edge:1,debounce:5});
  setWatch(pulseHnd,pulsePort,{repeat:true,edge:-1,debounce:5});
  setTimeout(logPulse,5000);
}

Next switched to terminal window and checked several times.

initWP()
=undefined
new Uint8Array([1, 1, 0])
>initWP()
=undefined
new Uint8Array([1, 1, 1, 1, 1, 0])
>initWP()
=undefined
new Uint8Array([1, 1, 1, 1, 0])
>initWP()
=undefined
new Uint8Array([1, 1, 1, 0])
>initWP()
=undefined
new Uint8Array([0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0])
> 

How can I get raising edge several times, without having falling edge between ?
Checked the same with one watch (edge:0) and got similiar result.