Exponentcms Exponent CMS → 2.0.9

The internal and external alias type pages are simple links to an interal page or web address, they are not a content page and therefore can not be a standalone page.

Though this was noticed in the Navigation module conversion, it appears to have always been a problem. You can't edit either of those types in the standalone manager since it assumes every standalone page is a content page, besides having a standalone page (a link holder) as NOT in the menu hierarchy is meaningless.