When I'm in the edit order screen I have this highlighted in red at the top of the screen:
WARNING_ORDER_TOTAL_SUBTOTAL

my admin debug file says:
[21-Jul-2014 21:53:45 UTC] PHP Warning: include_once(includes/modules/shipping/table.php): failed to open stream: No such file or directory in /home/mz/public_html/shop/includes/classes/shipping.php on line 58
[21-Jul-2014 21:53:45 UTC] PHP Warning: include_once(): Failed opening 'includes/modules/shipping/table.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/mz/public_html/shop/includes/classes/shipping.php on line 58
[21-Jul-2014 21:53:45 UTC] PHP Fatal error: Class 'table' not found in /home/mz/public_html/shop/includes/classes/shipping.php on line 59


But these errors are only generated by edit orders. I don't recieve these errors when looking at the shipping modules in admin or as an error in regular debug files.