problem with site map

[Julien]

Hello

When I use XMAP to generate a site map, it's works well but... on one website, the weblinks on the webpage (sitemap) doesn't work
http://www.ts-informatique.com/la-societe/plan-du-site.html

xMAP systematically adding this to the end of the link : ?Itemid=302

For exemple :
The link should be like this :
http://www.ts-informatique.com/component/weblinks/17-outils/10.html

Xamp do this :
http://www.ts-informatique.com/component/weblinks/17-outils/10.html?Itemid=302

An idea ?
Thanks