I'm having some very weird issues and a few questions.

1. Some contents are being visible to guest but hidden for admins, even in editing mode. This issue took off my ability to delete content posted earlier.
2. How to identify the host pages (should I say "source page" ?) for content being added to a sitewide area ?
3. Some subpages won't be able to be validated by validators even they are allowed to.

Every suggestions are appreciated.