If this is a RootPage then the page stack will contain all violation of all requests that are subsequently served to resources loaded by the page. You are able to differentiate by the Route and the URL.

Unlike a exception stack the order is not really important as all items are in violation and even though you normally find items in the same order there is no guaranty that "test A" is before "test B"

This page is the owner of other requests, meaning that this page may initiate Ajax call's from Java script or the loading of embedded resources or files. If that's the case it will collect the incidents of it's child requests it self end even though this request doesn't not cause a incident directly, the resources it owns may.

It is therefore always interesting to test page owner incident stacks as well

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

IPageRequest Interface
IPageRequest Members