Adding RadDiagramConnection in RadDiagramContainerShape doesn't work correctly in some cases:

-The container shape bounds increase each time it is expanded, when the routing of the diagram is enabled (RouteConnections=True) and you have a connected RadDiagramShapes placed in a collapsible RadDiagramContainerShape, 

-When you try to connect shapes placed in a RadDiagramContainerShape the RadDiagramConnection is not added in the container items.

-When you delete a RadDiagramConnection that is placed inside a RadDiagramContainerShape with the Delete key and then undo (Ctrl+Z) the deletion, the shape is added in the diagram items instead of the container items collection.

Fixed in LIB version: 2014.2.0825