Determining Use Cases Correctly

I have a project this semester to basically do everything but code a complete system; which obviously involves finding and creating use cases, and I'm having trouble figuring out a few things...

1. 
   

   Can the system be referred to as an actor? Or involved some other way? (In the case of CRON jobs for example)

   
   


2. 
   

   Can automated processes be considered use cases if they don't involve any human/entity?

   
   


3. 
   

   How "deep" should I go? Such as "Add Information", "Change Information", "Delete Information" Instead of "Add/Update Information".

   
   


4. 
   

   Am I on the right path? I have a feeling I'm doing this completely wrong.

   
   

Here's the revised use cases I just wrote, I'd be very grateful if anyone could give me some feedback...

http://ift.tt/1tFDLkY

EDIT: Pastebin for anyone not comfortable with that link http://ift.tt/16389KF