Display/Print Order of Elements in DWG

Good morning,

I am working on a DWG in DWG Mode and I have filled shapes that I am trying to put behind some elements. I currently have two files referenced with all elements at 0 elevation. I created the shape at -100 elevation, but it still shows up on top. Within the same model that I have these shapes, I will have other elements that I will to show on top, so I don't think controlling the update sequence is appropriate. Any thoughts on why these shapes are showing up on top?