Norton Safe Web rating question

I went to Norton Safe Web website and typed in a couple sites and Norton says they are good and have a green checkmark,  but when I read the reviews on the right side of the screen. All the reviews are bad. Some from up to a year ago.

 

My question is

 

How often is a particular site checked by Norton?

 

Whenever I search in google or yahoo or Norton Safe Search and green checks come up, it's almost like I can't trust the rating unless I go to the full report and look at the  community ratings and compare.

 

Thanks Kevin