Rails 4: accepts_nested_attributes_for / nested forms

I do not know what the protocol is if you have a rails question with several files. Do you post all here? I have asked a question on stack overflow buy have not found an answer yet:

http://stackoverflow.com/questions/25291821/rails-4-with-nested-attributes-and-nested-form

I was hoping to get more eyeballs on it. If this is not correct to provide link to stack overflow please let me know.

I am having trouble getting the models and new add form setup to save all data for my first solo rails project. I have worked through some tutorials and done basic reading on rails so far so I might have made a basic conceptual mistake. The essence appears to be that some of the related model data is saved but not all. Any tips would be greatly appreciated.