Norton Internet shown as a trial in Manage your Norton Products

Hi

I purchased a  Norton Internet key when my NIS expired.

I have installed it on my PC my android phone and tablet.I have also installed it on my son and daughters laptops as I can install it on 5 devices.

When I go to Manage Norton both my son and daughters laptops are shown in red as "trial" all the others show the Norton key can anyone tell me why?

I have tried searching without any luck

thanks