The overlapping is a normal function of the Reaktor GUI design. It was not intended this way, but due to the way the UI determines object placement, it was not possible at the time to make them auto-appear on the panel and not overlapp. In order to move them, you just simply unlock the interface and move them where you need them, and then lock the interface back again. this is explained in more detail on page 106 of your Reaktor 3 Manual.