How to get fields exported in correct order?

[buttonsbond]

I've got this working on Docker, and can run a spider with something along the lines of docker exec -t portialatest portiacrawl "/app/data/projects/nproject" "nproject.com" -o "/mnt/dc.csv"
I've got spiders setup for a few sites which all scrape the same data, my problem is that the exported fields are in different orders, I've tried inserting FIELDS_TO_EXPORT and also CSV_EXPORT_FIELDS into settings.py but seems to have no effect. I'm wanting to get the fields output all in the same order - the name of the fields (Annotations) are Ref, Beds, Baths, Price, Location
Could some kind soul point me to the correct solution please? Many thanks.