Working with simple arrays in as3, but I'm getting weird behavior

Question

My code goes like this:

if (hitTestObject(target.hit))
{    //pushes a number into an array
    stageRef.addChild(new Explosion(stageRef, x, y));
    myArray.push(myArray.length);
    removeSelf();


 //checks array length
if (myArray.length == 3){
    gotoAndStop(2);
    trace(myArray.length);

When I run this, I get a number and a "Hit" Displayed in the output console, so every time the hittest is called, it should go up by 1 to show:

1
Hit
2
Hit
3
Hit

However, I'm getting seemingly random repeated numbers in this manner:

1
Hit
1
Hit
2
Hit
1 
Hit
3
Hit
3
Hit
5
Hit
1
Hit

What could be causing this?