strange behavior with "reset" as action name

I will post the code from diferent file... In both cases user is logged and $this->session->get('auth') returns an array.

Situation 1.

$router->add('/resetpassword', array(
        "controller" => "user",
        "action"     => "resetpassword",
        ));

public function resetpasswordAction()
{
        /* redirect to profile if user is logged */
        if ($this->session->get('auth')) {
            $this->response->redirect('profile');
        }
}

Volt file:

<form role="form" method="POST" action="/reset" id="registration-form">
    <div class="form-group col-xs-12 col-md-4">
        <label for="email" class="highlighted-text">Email address</label>
        {{ form.render("email") }}
    </div>
    <div class="form-group col-xs-12 col-md-4 form-button-wrap">
        <button type="submit" value="Submit" class="btn btn-primary">Reset Password</button>
    </div>
</form>

In the log file :

[Thu Dec 18 20:24:22 2014] [error] [client 127.0.0.1] PHP Notice:  Undefined variable: form in /Users/IGonza/git/xxx/app/cache/_users_igonza_git_xxx_app_views_user_reset.volt.php on line 8
[Thu Dec 18 20:24:22 2014] [error] [client 127.0.0.1] PHP Fatal error:  Call to a member function render() on a non-object in /Users/IGonza/git/xxx/app/cache/_users_igonza_git_xxx_app_views_user_reset.volt.php on line 8

And page is redirected to /profile.

Situation 2.

$router->add('/reset', array(
        "controller" => "user",
        "action"     => "reset",
        ));

public function resetAction()
{
        /* redirect to profile if user is logged */
        if ($this->session->get('auth')) {
            $this->response->redirect('profile');
        }
}

Volt file is the same, everything else is the same except I changed 'resetpassword' to 'reset'.

The same error messages are on the screen and page is not redirected.

So I have 2 questions:

1. Why is there that inconsistence? 'reset' is reserved word?

2. Is there any difference between return true and return false after redirect functon?