I actually click on the node in Ink's XML Editor to select it, like the circle, then go to the drawing and right-click the boxed node - must be arrow select - and select duplicate. That way you know you have the circle and not the connector node.
I practically do no drawing in Ink. I select nodes in XML Editor and adjust size and position with the with the top toolbar. At most I do a rough drawing of the shape, shuffle it Up. Down. Indent, Unindent. in XML Editor to group it, Fill and Stroke with side box, resize with toolbar, and drag it to a custom made grid until it snaps.