Hi John,
Thank you for the quick reply.

But, the links are "all" within the 1 domain, and I do not use a sub-domain.

I have the Joomla site links in 1 menu.
Then, in a sub-directory (mysite/subdir) is contained the main portion of my site.

My link in the Joomla menu is http://www.mydomain.com/subdir/

The HTML sitemap shows all of the links I have flowing to the sub-directory when I click on the link to the sitemap in the Joomla menu.

The XML sitemap does NOT show all of the items in the menu.
It only shows links to log in and membership types.
But the main directory link is not in the XML sitemap, although it appears in the Joomla menu.

In the screen shot, notice the 2 /prevpmd/ links.
There should be a third link which points to the entry page of the directory (/prevpmd/index.php). But that link has been ignored by JSitemap.

Back to you...