[user registration add-on] Add new site - wrong domain and path

Hi

I created an form with gravity forms and I want this form to add a new user and a new site.
This all goes pretty well except that the form adds the wrong 'domain' and the wrong 'path' It adds '0' on the domain, and it adds an incomplete path. It only complete's the part of the path that is filled in by the user in the form.

example
When I add a site and user via the wordpress user backpanel it works at is should e.g.
domain: 192.168.0.1
path /~development/user-chosen-pathname/

What gravity forms returns is this
domain: 0
path /user-chosen-pathname/

What can I do about this?

Thanks!