log-in missing

I have a desktop and laptop, both have Norton 360.

I have a web site with a desktop icon. When I click on it, it opens and my user ID and password are automatically entered. No problem.

I wanted to enter the same site on my laptop and when I opened the log-in page, nothing happened. So, I went to Identity Safe, log-ins page and that site is nowhere to be found.

Why wouldn't the log-in info be in my vault? If it isn't in my vault, why does the ID/pw fill?