Form Submit Mystery

I cant figure out why my button says “submit Query” (1.3.3)

 

I have <?php echo $this->Form->button('Login', array ('type' => 'submit') );?>

 

If I use <?php echo $this->Form->button('Login', array ('type' => 'submit' , 'value' => 'Login') );?> with the value it show “login” but that’s not how it should work… correct?

 

Thanks

 

Dave