Trash
When page content on Web Express is deleted, it is moved to the trash, where it can be restored at a later time if it was accidentally deleted.
You can view the trash under the content menu. Purging content in the trash will delete it permanently. You cannot purge the entire trash, only one page at a time. There is no automatic purging of the trash at this time.
Trash & Redirects
You cannot create a redirect from a path if the path was used on a page that is currently in the trash. You'll either need to purge (permanently delete) the page, or use the node/nodeID path as your redirect source.