In my graph, I have a subgraph consisting of 2 groups containing nodes, with an edge between the groups. There are no edges between any of these elements and anything in the main part of the graph. Yet when I use Hierarchical Layout, it always puts this subgraph in the midst of the main graph, with main graph edges passing thru the subgraph. More sensibly, the subgraph should be off to one side. I *can* accomplish this with 2 passes, dragging the subgraph to the side between passes then turning on Use Drawing As Sketch, but this seems like behavior that should be easily specifiable.