We have worked out the issues in a support ticket. The shipping rule needed to be setup correctly, then the product insert and update pages needed to add the prodType value to the db. Once this was done it was all working correctly.
The next thing that we did was update the download file server behavior. When we reconfigured it the download was occurring for the correct file as expected. We just had to specify the folder that the files were in, and select the form element that holds the name of the file.