Seems not all the existing aliases are shown.

Steps to reproduce

1. Create a node "About" under a node "Company" (both in English). The node "About" will be available through the alias "Company/About".
2. Add a Norwegian translation to the node "Company" with the name "Company_Nor". If Norwegian is not on the list of prioritized languages for a siteaccess, the node "About" will not be available through "Company_Nor/About" alias.
3. Add Norwegian to the list of prioritized languages for this siteaccess:

[RegionalSettings]
SiteLanguageList[]=eng-GB
SiteLanguageList[]=nor-NO

The node "About" will become available through the alias "Company_Nor/About".

4. The newly created alias "Company_Nor/About" is not shown on the list of auto-generated aliases for the content node "About" in the admin interface (content/urlalias/node_id).