Do you use different RadDocking controls in each page? Please, note that drag and drop operations of pane between two docking controls is not supported. Here you find more information about nested DnD scenarios - http://www.telerik.com/help/wpf/raddocking-features-nesteddocking.html
. This will affect scenarios 1 and 3
According to second issue, I would suggest setting RadDocking.FloatingLocation
attached properties. Please, refer to the following article - http://www.telerik.com/help/wpf/raddocking-features-panes-docked-floating-panes.html
Hope this helps.
Check out Telerik Analytics, the service which allows developers to discover app usage patterns, analyze user data, log exceptions, solve problems and profile application performance at run time. Watch the videos
and start improving your app based on facts, not hunches.