Your <label> tags aren't being output correct.
On line 134 of the form-output.php file you need to change:
$for = !in_array( $field_type, array( 'checkbox', 'radio', 'time', 'address', 'instructions' ) ) ? ' for="%4$s"' : '';
to
$for = !in_array( $field_type, array( 'checkbox', 'radio', 'time', 'address', 'instructions' ) ) ? '%4$s' : '';
Please update your plugin.