inconsistent behavior of interwiki links

Interwiki linking does not seem to have a consistent behavior (by interwiki linking I am refering to linking to a page within the same wiki) In some cases I have witnessed that a link to a page within the wikispace is recognized as an existing page, and in others Xwiki interperets the reference as a request to create a new page with a different parent. This has made it possible to create multiple pages with the same name if they are created from different parent pages (again, this behavior is inconsistent, in some cases the link is recognized as an existing page). This behavior seems to have something to do with adding a table of contents and I have now consistently created multiple pages with the same name by adding a table of contents to the parent. If there is no table of contents interwiki links seem to be recognized correctly. I am adding table of contents using #toc ("1" "6" "true") Is there any solution to this? - Mark