I personally havent used the payout method as yet so don't have personal experience and if as you say the guide is no help, then perhaprs sent Airbnb a twit, ther are very quick to respond and vvery helpful
As per Dave & Deb's guide - please see below process to contact via Twitter if you are not already using it
2. Contacting Airbnb Via Twitter
I find the second best and easiest way to contact Airbnb regarding any issues I may be having is by using Twitter. Airbnb seems to have dedicated staff who monitor their Twitter feeds and I usually hear back from them within 5-10 minutes of posting my isssue.
Step 1: Log into Twitter
Step 2: Search for @Airbnbhelp and choose "Follow" them
Step 3: Send a Direct Message (DM) explaining your issue and wait for their response. They may ask for information such as your listing but always provide it over DM so it is not public.
Hope you get it sorted and perharps update this post on the correct process once you know just for future reference
Ama