The following bug has been logged on the website:
Bug reference: 15385
Logged by: David Betterton
Email address: dab1961uk@gmail.com
PostgreSQL version: 9.5.14
Operating system: Linux
Description:
This is stated in the documentation, but it's totally ludicrous, it means
that every csv has to conform to the order of the database columns, or the
caller has to explicitly set the column order - which is in the CSV file