The order of panes in a region as it relates to features.

features.php

<?php

//This is the default order exported to the oa_panopoly_users.features.inc file:
$data['user:user:default']->display->panels['contentheader'] = array(
  0 => 'new-d3a2a9fb-f88a-4730-bfab-c36f4e0af395',
  1 => 'new-faf0ad46-b575-4f96-874d-9a4548cc8da3',
  2 => 'new-a617e554-6ad7-4d25-9d89-627d130d8be3',
);

// This is what features wants to see as far as determining whether there is a diff or not.
// If I change the order to match this then the panes get reordered in the UI.
$data['user:user:default']->display->panels['contentheader'] = array(
  0 => 'new-a617e554-6ad7-4d25-9d89-627d130d8be3',
  1 => 'new-d3a2a9fb-f88a-4730-bfab-c36f4e0af395',
  2 => 'new-faf0ad46-b575-4f96-874d-9a4548cc8da3',
);

// I assumed it would be okay to reorder these elements due to the fact that the actual content has a position set.
// But this is not the case.
$data['user:user:default']->display->content['new-a617e554-6ad7-4d25-9d89-627d130d8be3'] = (object) array(
  'pid' => 'new-a617e554-6ad7-4d25-9d89-627d130d8be3',
  'panel' => 'contentheader',
  'type' => 'views_panes',
  'subtype' => 'open_atrium_discussions-discussion_user_reply',
  'shown' => TRUE,
  'access' => array(),
  'configuration' => array(),
  'cache' => array(),
  'css' => array(),
  'extras' => array(),
  'position' => 2,          // <----- here
  'locks' => array(),
  'uuid' => 'a617e554-6ad7-4d25-9d89-627d130d8be3',
); /* WAS: '' */