When a submission comes in through a DIY form, it looks for a "Personal" persona type first.  If the "Personal" persona type cannot be found it will use the one set as the default under Manage men > System Defined Fields > Persona Types.

Workaround:

The name of the Personal persona type can be changed to something else (ex: Home). This will cause eTapestry to use whichever persona you have currently set as the default. Here are the steps to update the Personal Persona:
  1. Click the Management tab
  2. Click System Defined Fields under Database Configuration
  3. Click Persona Types
  4. Click the Personal value, and Personal will show up in the Name field under Add Value. You can edit it here.
  5. Click Update
  6. Click Save and Finish under Navigation
eTapestry will now use whichever Persona Type is currently set as the default when adding accounts created through a DIY form.