Is it possible to compute the hydraulic data for lateral pipes?

I am designing a storm sewer system with a 12x12 box down the middle of a road and curb inlets connected via 24" laterals. I need the link summary data for the lateral pipes for plan production, but ORD/DU doesn't seem to compute this data when created using the "Place Lateral" tool. I also tried to create the laterals by inserting a "Free Connection" node (using "Insert Node" tool) on the 12x12, and then using the "Place Conduit" tool. This computed the hydraulic data I needed for the lateral pipes, but wouldn't add the flows to the 12x12 trunkline, whereas the "Place Lateral" tool DID add these flows into the 12x12. Is there something I am missing with the node/conduit tools to get it to add the flows to the 12x12? Or do I need to use both of these tools in order to get the design information I need?