if ($orderChanged) {  // update the stores with their new navmenu_position
                echo "order changed!<br/>";
                echo "orderedStoresList before ->";
                print_r($orderedStoresList);
                echo "<br/>";
                foreach ($newStoresList as $index => $storeName) {
                        echo 'looking at store position-->' . $index . '<br/>';
                        if ($storeName != $orderedStoresList[$index]->post_title) {
                                $orderedStoresList[$index]->navmenu_position = $index+1;
                        }
                }
                echo "orderedStoresList after ->";
                print_r($orderedStoresList);
                echo "<br/>";
  }


var_export() of $newStoresList and $orderedStoresList:

array (
  0 => 'tester',
  1 => 'tester2',
  2 => 'tester3',
)

array (
  0 =>
  stdClass::__set_state(array(
     'ID' => '2272',
     'post_title' => 'tester',
     'post_name' => 'tester',
     'store_id' => '1',
     'status' => 'publish',
     'created_date' => '2011-09-22 01:29:50',
     'items_per_page' => '12',
     'show_all_items' => '0',
     'grid_columns' => '3',
     'default_sorting' => 'alphabetical',
     'default_sorting_by' => 'tag',
     'items_order' => '13623:1,16518:1,16519:1,21369:1,21373:1,25522:1,25557:1,25566:1,25568:1,25979:1,37802:1,38276:1,38280:1,38281:1,38282:1,38286:1,38287:1,42160:1,42194:1,42195:1,42197:1,42291:1,42489:1,42808:1,42811:1,43881:1,53897:1,59020:1,59064:1,59800:1,62793:1,63063:1,63256:1,63785:1,64456:1,64728:1,76727:1,77022:1,77045:1,77048:1,77641:1,82990:1,82994:1,82999:1,83000:1,84743:1,84874:1,85187:1,85188:1,85337:1,85349:1,85409:1,85412:1,85419:1,85423:1,85466:1,85665:1,85666:1,85668:1,85670:1,85671:1,85673:1,85674:1,85676:1,85677:1,85680:1,85717:1,85885:1,85886:1,85887:1,85888:1,85893:1,86120:1,86121:1,86122:1,86124:1,86125:1,86126:1,86128:1,86166:1,86169:1,86170:1,86171:1,86172:1,86173:1,86174:1,86175:1,87534:1,87893:1,87895:1,87896:1,87897:1,87898:1,87900:1,87901:1,87902:1,87903:1,87912:1,87914:1,87917:1,87925:1,87927:1,87928:1,87929:1,87930:1,87931:1,87937:1,87939:1,87945:1,87946:1,87947:1,87948:1,87951:1,87952:1,87954:1,87956:1,87958:1,87969:1,87981:1,87983:1,87985:1,88078:1,88081:1,89712:1,89844:1,89845:1,89850:1,92598:1,92976:1,92978:1,92979:1,92981:1,92983:1,93001:1,93002:1,93005:1,93006:1,93007:1,93008:1,93009:1,93010:1,93165:1,93166:1,93167:1,93168:1,93169:1,93170:1,93171:1,93172:1,93173:1,93175:1,93178:1,93180:1,98175:1',
     'featured_item' => '0',
     'navmenu_position' => '1',
  )),
  1 =>
  stdClass::__set_state(array(
     'ID' => '2273',
     'post_title' => 'tester2',
     'post_name' => 'tester2',
     'store_id' => '2',
     'status' => 'publish',
     'created_date' => '2011-09-22 01:32:17',
     'items_per_page' => '12',
     'show_all_items' => '0',
     'grid_columns' => '3',
     'default_sorting' => 'alphabetical',
     'default_sorting_by' => 'tag',
     'items_order' => '89844:1,53897:1,16519:1,25566:1,25568:1,25557:1,25979:1,21373:1,82990:1,59800:1,21369:1,59064:1,59020:1,42489:1,43881:1,37802:1',
     'featured_item' => '0',
     'navmenu_position' => '2',
  )),
  2 =>
  stdClass::__set_state(array(
     'ID' => '2274',
     'post_title' => 'tester3',
     'post_name' => 'tester3',
     'store_id' => '3',
     'status' => 'publish',
     'created_date' => '2011-09-26 02:00:50',
     'items_per_page' => '12',
     'show_all_items' => '0',
     'grid_columns' => '3',
     'default_sorting' => 'alphabetical',
     'default_sorting_by' => 'tag',
     'items_order' => '13623:1,16518:1,16519:1,21369:1,21373:1,25522:1,25557:1,25566:1,25568:1,25979:1,37802:1,38276:1,38280:1,38281:1,38282:1,38286:1,38287:1,42160:1,42194:1,42195:1,42197:1,42291:1,42489:1,42808:1,42811:1,43881:1,53897:1,59020:1,59064:1,59800:1,62793:1,63063:1,63256:1,63785:1,64456:1,64728:1,76727:1,77022:1,77045:1,77048:1,77641:1,82990:1,82994:1,82999:1,83000:1,84743:1,84874:1,85187:1,85188:1,85337:1,85349:1,85409:1,85412:1,85419:1,85423:1,85466:1,85665:1,85666:1,85668:1,85670:1,85671:1,85673:1,85674:1,85676:1,85677:1,85680:1,85717:1,85885:1,85886:1,85887:1,85888:1,85893:1,86120:1,86121:1,86122:1,86124:1,86125:1,86126:1,86128:1,86166:1,86169:1,86170:1,86171:1,86172:1,86173:1,86174:1,86175:1,87534:1,87893:1,87895:1,87896:1,87897:1,87898:1,87900:1,87901:1,87902:1,87903:1,87912:1,87914:1,87917:1,87925:1,87927:1,87928:1,87929:1,87930:1,87931:1,87937:1,87939:1,87945:1,87946:1,87947:1,87948:1,87951:1,87952:1,87954:1,87956:1,87958:1,87969:1,87981:1,87983:1,87985:1,88078:1,88081:1,89712:1,89844:1,89845:1,89850:1,92598:1,92976:1,92978:1,92979:1,92981:1,92983:1,93001:1,93002:1,93005:1,93006:1,93007:1,93008:1,93009:1,93010:1,93165:1,93166:1,93167:1,93168:1,93169:1,93170:1,93171:1,93172:1,93173:1,93175:1,93178:1,93180:1,98175:1',
     'featured_item' => '0',
     'navmenu_position' => '3',
  )),
)