The simple solution I found (after much experimentation) is to trim the size of the .CSV so that there were no blank columns or rows. Here is a template using Google Sheets https://docs.google.com/spreadsheets/d/1P70ICK5wX_8qLT5RgRoVyJL4zWmoQGQXQLt3AukpzLQ/edit?usp=sharing
