OK. Thanks.
I've duplicated the single file which has a different domain name and used the duplicated file (which I've named in the same domain as the remainder of the web) within the web; all pages are now indexed in the site map.
At least, they are when I run a non-www generated list (ie, buy1or2.com).
When I run a www generated list (ie, [ External links are visible to forum administrators only ]) the list displays just 27 entries (the 26 it was generating yesterday plus one for the newly 'duplicated' page referred to above).
(Question: Am I understanding correctly that the non-www generated list include www's, where a www generated list doesn't include non-www's?)
Reading this forum I know you're going to tell me to rationalise all the links to be non-www. However, I can't find any links which include 'www'; quite what is it I'm looking for, to change? For example, I see that on page [ External links are visible to forum administrators only ] I have a link to '../index.html'. Is this somehow converting into being [ External links are visible to forum administrators only ] for the site map? If this is so, and if this is the issue, what should I change it to?
Don't know much, do I!