To reproduce:
-add a RadDock with several ToolWindows docked to one common container;
-drag the container ouside the RadDock in order to create a FloatingForm, holding all of the ToolWindows;
-close the FloatingForm via "X" button;
-save the layout;
-restart the application;
-load the layout;
-iterate through all of the ToolWindows and call their Show() method. Each ToolWindow is displayed in a separate FloatingForm; If you skip the step with restarting the application, all ToolWindows are shown in one common FloatingForm;