deleted page is still accessible in Confluence when accessing via viewpage.action?pageId in the url

Deleted pages can still be accessed in Confluence when one enters their pageId in the url.

For example:

http://confluence.atlassian.com/pages/viewpage.action?pageId=196837485
http://confluence.atlassian.com/display/CONFKB/Office+Connector

The links above are referring to the same page that has been deleted. Accessing the page using the first url still returns the page despite that it has been deleted.