TRS2019 Kickstarter Country 2

I'm trying to run the TRS2019 Kickstarter Country 2 Local Freight. When I get to Kalen Turner Industries to load the steel rods and steel coils, the rods load but the coils do not. I opened the session to edit and view the properties of the flat cars and I noticed that none of the cars has steel coils installed for loading. Is this an error in the session or am I overlooking something? Can someone tell me how to load the steel coils?

You've already found the answer. Clearly you need to add the product to the flat cars or they can't load them. Mind you, you shouldn't have to fix it, but there you go.