The file you sent has a few probelms to it
of the 5 upload file behavior you have in place, only one of them has the upload folder set to the author/author_files folder. for testing it would be best to start with only one file upload in order to track the results.
you have a few file fields that use the same name. This is not valid. each form element must use a unique name.
the multiple upload behaviors and reusing the same name are going to cause skewed results.