About the new Member Authentication App

So, with the new Members Authentication App…

It seems to allow you to set it to use a custom sign up

While the text above the link is muted… it does allow you to click it.

When you click it, it brings up the custom signup window behind the overlay which you can then click through to.

Is this intended?

Because when I tried to assign a custom popup as the signup form, it doesn’t work. It just brings up the default signup form.