Although I have lots of groups(60 as a whole) for my website: http://www.downloadformsindia.com, xmap joomla module doesn't appear to exhibit proper sitemap structure- it's showing only primary menu products only. What is the issue?

For instance every condition indexed by this site : http://www.downloadformsindia.com/select-the-state-to-download-the-form.html is really a category by itself, but overlooked by xmap in sitemap.

Automatically xmap only compares the menu products, not groups and sections. You will find plenty of extensions for xmap available. Possibly you have to configure one of these simple?