When enabling the sh404sef Joomla component I noticed that is added a /table/ to my URLs.  To fix this in the newest 2.x version of sh404sef do the following.  Go to Components>sh404sef>Control Panel then go to 'Extensions Panel' and look for 'Insert Content Table Name' and select No.  Then you'll need to save.  After saving go URL manager and click Purge.