Bitmap Has Higher Index Than Sprite?

I’ve just switched over to AS3, and I’m completely stumped with something.

I’m working on a project where I keep adding children to a MC already on the screen. There are two types of these children: Sprites that I use to draw lines using moveTo, lineTo, ect. Then there’s sprites that have children inside of THEM that are bitmaps.

For some strange reason, the Sprites with the bitmaps on them always have a higher depth/index (AS3 terminology is still weird for me) than the normal Sprites.

Here’s a diagram of my MC/children/children layers:

                ---------------=> (Sprites that draw lines)

(MC on Stage) =>
---------------=> (Sprites that hold bitmaps) => (Bitmap)


I’ll post my code if need be. I’m just hoping there’s a simple answer!

Thanks!