The navigation control in Sitefinity reads from SitefinitySiteMap which is an extended SiteMap control and as the roue was modified now I suppose if this is happening for www.domain.com/news it will happen for all pages created under the root (they will have www.domain.com/Catalogue/url).
A temporary workaround can be to add the ~//Catalogue/url as additional url for news items.
If you can share with me the routing logic used to get the catalogue added to the route so I can get better idea or the routing.
the Telerik team
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