New Logins added on one pc don't appear on other pc

This is a strange one:

I added two new logins to my online vault yesterday, on my Windows 7 pc.

But they don't appear on my login list when I try to access them on my Windows 8.1 laptop (same Norton account, same vault password, NIS version 22.6.0.142 on each pc).

I thought the idea of the online vault was that you could access all your login details from any pc anywhere?

This has never happened before.

Has anyone else experienced this?