Issue with dff in external supplier registration

Summary:

I want to hide the VDC Verified field that is a DFF on the external Supplier Registration Screen, and when I go to the Registration fields and forms section there are 3 built in form rules. The Supplier Registration default is the form rule that is being used on the screen and does not have a condition applied to it. I go and make a new form/business rule that also has no condition, but when I try and edit the fields in there, it does not effect the screen. Do you know how to get it to apply to the