Sign API - Prevent Automatic Field Detection on New Agreement

When I create an agreement in the "AUTHORING" state via the API, Adobe is adding signature fields automatically to the document in the agreement. When I view the agreement to edit it and send it off, I need to manually remove all the incorrectly added form fields, then manually add correct form fields.

I would like to prevent the automatic field detection, so that any documents that are part of agreements I create using the API start off with no form fields. I've tried looking for how to do this online, and have messed around with parameters in the API call to create the agreement, but I haven't been able to accomplish it. Is this possible to do with the API?

I saw some references to "disabling automatic field detection at the at the Account/Group level". Is that the only way to prevent this feature?

Bonus question: is there a way to clear all form fields from a document in one go? Otherwise I need to do them one at a time, which is inconvenient.