fix legacy member wrapping new api and mixing email/login name

src/umbraco.cms/businesslogic/member/Member.cs

@@ -225,7 +225,7 @@ namespace umbraco.cms.businesslogic.member
                 throw new Exception(string.Format("Duplicate User name! A member with the user name {0} already exists", loginName));
 
             var model = ApplicationContext.Current.Services.MemberService.CreateMemberWithIdentity(
-                Email.ToLower(), loginName, "", mbt.MemberTypeItem);
+                loginName, Email.ToLower(), "", mbt.MemberTypeItem);
             model.Name = Name;
 
             //The content object will only have the 'WasCancelled' flag set to 'True' if the 'Creating' event has been cancelled, so we return null.