[racket] Graphical Toolkit change question

Hey,

I have been using the Graphical Interface toolkit to create a GUI for some
kind of game. Things were starting to take shape, but with the new release
and rewrite of the GUI I seem to have a little problem. When adding children
to a panel container (didn't check for other containers), the first child is
always shown on top. I.e. children are added behind each other. 

I have a background that takes the size of the whole panel and if I add
anything after that it's shown behind that background, as when before the
release it would just show in front of it. Is this an intended behavior?

Cheers,

Chris