When HTTrack creates the index start page that lists all the sites, sometimes
it uses the title of the link's target page, and sometimes it just uses the
actual original web address. I've discovered what makes it choose one or the
other. If in the code of the web page, the title tag comes directly after the
head tag, then the link will use the page title. But if the title tage comes
after some meta tags within the head tags, then the link will be the actual
original web address.

Example (without pasting HTML data :))

This will produce a link using the title:
-----
head
title blablabla /title
meta bla bla /meta
/head
-----

This will produce a link using the original web address:
-----
head
meta bla bla /meta
title blablabla /title
/head
-----

I hope this helps. :)