This is a single fieldset setup: you can see the fields in the fieldset and the legend. Since the fieldset is meant to group the fields (and not the whole form), you'll find the submit button outside the fieldset - you can change this behaviour by setting the "submit" configuration parameter to 1, as you'll see in the two other fieldset example.
Below are the dumps of some PHP variables - submit the form to see the changes!
Contents of the $_POST array:
$_POST = array (
)
Results of a $clonefish->getElementValues() call: array ( 'inputText' => NULL, 'inputPassword' => NULL, 'textarea' => NULL, 'inputHidden' => 'something you don\'t want the users to see', 'id' => 'fieldset1', )