Yes. If you go to: Menu > Transaction History > Gross Earnings - that option will give you headers in the .csv file. I don't understand why it doesn't give a header if you choose download a .csv file under the "Completed Payouts" option. The difference between the two is, you can choose to download per listing under "Completed Payouts" and "Gross Earnings" includes all listings.
I think they should correct the problem under "Completed Payouts."