Hi
So as far as I observed, among the sitemap links generated, some of them belongs to unpublished pages and old URLs. When I checked for cache in Network tab, I was able to observe that cache was not stored and life time is set to 0. As for the configuration , we are using a bit modified Sitemap servlet from OOTB ACS commons servlet. The configuration seems to be valid as the same configuration works good for other subsequent projects (assume that our custom servlet is common for multiple projects).