Duplicate URLs to one Content Item

Hi,

I have a problem with a website using Joomla 1.0.8 and SEF Advance 5.8.1. I am not sure when it started but for some reason i am getting many links to pages from sections and categories where the content is not located.

For example:

I have a page titled page1 in sectionA categoryA
The URL would be www.mysite/sectionA/categoryA/page1/

But the page would be also accessible from many other URLS, for example:
www.mysite/sectionB/categoryB/page1/
www.mysite/sectionC/categoryC/page1/
www.mysite/sectionD/categoryD/page1/

Does anybody know what the cause of this could be? Many thanks for any help.

Please always use the latest version when reporting something. It may got fixed so no point posting something about old version.