Trouble with callback and default parameter

[eluser]solid9[/eluser]
Actually that is normal if you put your codes inside an index function/method,
It will be executed automatically so don't be surprised this is the default and nothing to worry.

Also if you want to check if a duplicate email exist in your database,
You can just simply use the <b>is_unique</b> to check for email duplicate as native rules,
in your form validation.