Hello Raoul,

in your case try to unpublish the data source of type 'content'.
For some weird reason it seems that sh404sef generates 2 different urls for the same article when linked to a menu.

The issue is not about grabbing rewritten urls from sh404sef, basically JSitemap is an aggregator of urls but doesn't generate urls by itself.

The problem arises when using sh404sef because it manage urls in a different manner from Joomla native SEF and associates raw links to the article alias. Joomla uses different links in the native content component and menu items, this is the reason that leads sh404 to record duplicates and different links to same article. However it usually works fine and choose the same alias for both. You could also try to have a look in the URLs list of sh404sef, just to check if both links are present, in your case you should have both:

brands-en/avaya

and

sells-new-used-and-refurbished-avaya

Regards

John