General Question About common Instance Names in Flash CS4 (AS3)

Question

I tried something interesting recently. I had code effecting an object with the instance name : object_mc.
Now I added another object and gave it the same instance name.
The result was, that the code only effected the most recent added object (no error).
Is there a way in flash to have multiple objects with the same instance name all being affected by one piece of code?
~ Thanks for any thoughts, advice or facts. ~

Answer 1

Advice: avoid it... if you want to control different instances, give them different instance names.
It depends on what you mean by "one piece of code".  Directly using the instance name to target the movieclips will work as you have seen already... Last one added gets the attention.
To use the instance name to take action is doable more along the lines of testing each movie to see if it has the name, but still, you would have to target each using a different means. 
For the piece of code below I have some number of objects on the stage and I test to see if they have an instance name assigned (object_mc) that is shared by some of them, and I am able to move them if they do, but I cannot use the instance name to target each of them for action... in this case I use the getChildAt method.
for(var i=0; i<this.numChildren; i++){
if(this.getChildAt(i).name == "object_mc"){
  this.getChildAt(i).x += 200;
  object_mc.x += 25;  // only moves the last object added