Orchard CMS Duplicate entry when creating a user - orchardcms

Question

I have been breaking my head over this. Please take a look at this code. This code is in the customer controller.
[HttpPost]
[Themed]
public ActionResult Register(string email, string password, string confirmPassword, Gender gender, string givenName, string familyName, string insertion, DateTime birthDate) {
ViewData["PasswordLength"] = MinPasswordLength;
var shape = _orchardServices.New.Register();
//1. Initialize new content of customer contenttype
var customer = _orchardServices.ContentManager.New("Customer");
if (customer != null) {
//2. Define the parts that need to be filled
var userPart = customer.As<UserPart>();
var customerPart = customer.As<CustomerPart>();
//3. Let's validate first if the user can be created
if (userPart!=null) {
//shape.Customer = _orchardServices.ContentManager.UpdateEditor(customer, this);
if (!ModelState.IsValid)
{
_orchardServices.TransactionManager.Cancel();
return new ShapeResult(this, shape);
}
//4. Now validate the user credentials.
if (ValidateRegistration(email, password, confirmPassword)) {
//Now create the actual customer.
userPart.UserName = email;
userPart.Email = email;
userPart.NormalizedUserName = email.ToLowerInvariant();
userPart.Record.HashAlgorithm = "SHA1";
userPart.Record.RegistrationStatus = UserStatus.Approved;
userPart.Record.EmailStatus = UserStatus.Approved;
customerPart.CreatedAt = DateTime.UtcNow;
customerPart.LastLogonAt = DateTime.UtcNow;
_membershipService.SetPassword(userPart, password);
var user = customerPart.User;
_authenticationService.SignIn(user, false /* createPersistentCookie */);
return Redirect("~/");
}
}
}
When this code is run, I end up with two entries for UserPart in my database. One with a related CustomerPart and one not.