How to insert top docked controls below previewsly top docked controls on a panel

I use panel.controls.add to add controls to the panel. But... they insert at the very top of it.

I tried the BringToFront and SendToBack methods, but does'nt seem to be working.

Any ideas? Thanks

EDIT:

what i want, is that they dock at the top of the container, but if there is another docked control there, the new one is displayed below that one...