Devices managment

I have Norton installed on 3 computers.

If I login to my account and I click on Devices (Dispositivi) I see that in one of that computers there is a trial version.

If I click on Services (Servizi) I see only 2 computers on a total of 5.

So I removed the device from my account and uninstalled Norton on the pc that my account flagged as trial then I installed it again.

Now in the Services page I see 3 computers on a total of 5 but in the Devices page I still see a trial version.

Why does it happen? If there is a problem with devices managment I hope you could fix it soon.