CreateUserWizard not showing any errors

I thought I had this working, but right now I'm confused.  When I try to cause an error by re-using an email, it gives me the success message, even though nothing is added.
This is my CreateUserWizard

           <asp:CreateUserWizard ID="CreateUserWizard1" OnCreatedUser="CreateUserWizard1_CreatedUser"                 MailDefinition-BodyFileName="~/CompanyWelcome.htm"                  MailDefinition-IsBodyHtml="Tru ...