Windows 7 Understanding user accounts and file permissions

Hi,

Can someone explain this to me.

(1)
When I go to "Control Panel -> User Accounts". There is only one account "User / Administrator".

Yet when I create a folder and look at the Security tab (in folder properties), there is a list of different users:
Administrators
SYSTEM
Users
Authenticated Users

These users don't appear in "Control Panel -> User Accounts"?

(And the owner of the folder is actually "User (User-PC\User)" which isn't even listed in the list??)

(2)
What I also don't understand is that on another drive letter (E) when I create a folder, I get a different list of users:
CREATOR OWNER
SYSTEM
User (User-PC\User)
Adminstrators
Users

The owner is still the same "User (User-PC\User)".

Why is that?

(3)
This folder that I created in E:\, and owner is "User (User-PC\User)". The permissions for "User (User-PC\User)" are all unticked except for "special permissions". Now, why does it not have the same permissions as "Administrators" (which has all ticked, full control, modify etc..), since the "User" account is an Administrator account??.

Thanks alot,