How to get details of original blacklisting?

A few days ago a customer of ours randomly told us our website was blocked by a big red warning from Norton.
At the time I could visit https://safeweb.norton.com/ and see that Norton claimed there was some danger with our site.
Since then I created an account, requested a review and now our website has a green OK.
I didn't do anything on our website mainly because I couldn't find any actionable info from the norton reports.

Is there any way to find out from Norton.

  1. Why the site was blocked, details, what url was infected, what type of virus was found, timestamp.
  2. How long this big red warning from norton has showed up to random visitors without us knowing.
  3. What would have happened if I didn't request a review?, would our site have been blacklisted forever?
  4. How often do Norton review previous (false) positives?