MC Listeners on top of each other trouble


I’m dynamically creating MC with help of an Array to store instance, in order to build something like a stack of photo.
In my loop, I’m adding listerners so that I’ll be able to click on each photo

for(var ix:Number=0 ; ix<my_total; ix++)   
mySlidesArray[ix].addEventListener(MouseEvent.MOUSE_OUT, onMouseOut);
mySlidesArray[ix].addEventListener(MouseEvent.DOUBLE_CLICK, nextSlideOut);
                mySlidesArray[ix].getChildByName("reactorZone"+ix).addEventListener(MouseEvent.MOUSE_OVER, slideAlign);

My problem is caused by the Mouse_Down, even if only photo is visible on top of all the other one, clicking on it seems to make the listeners of the photos below reacting…

Is it possible ? do listeners can’t be on top of each other and only detecting if nothing is on top of them?

Thank you