From the comments that is also not real multi-touch but is "simulating" it. My understanding is the way resistive works, if you touch two points on the screen then it will click in the middle. So what they have done is tied a click signal to that point in between a combination of two points that triggers as if it was multi-touch.

You could, theoretically (and some comments confirm), simply single touch in that middle spot and also get both green lights.