Permalinks and duplicate page slugs

Hi,

I am using WP as a CMS and have created loads of sections using parent pages with multiple sub pages in each section. Some of these sub sections are common and have common names, for instance there are multiple pages called “Contact Information” related to each sub section.

The site works perfectly, until I turn on permalinks. Then if I click on any page which has a duplicate name, for instance “Contact Information”, the page displays all the other pages with that slug, instead of the single page.

What is happening within the loop which is causing WP to fetch pages by slug/name as opposed to the unique ID? Am I correct in assuming this is whats happening? How can I fix it?

Michael.