My Account - Why does it say Trial under Devices for 3rd Device?

Yesterday I downloaded Norton Security Premium on my PC, my Laptop, my wife's laptop & my iphone. I had already purchased a 'key' from a retail store for 5 devices.

Now looking in My Account under 'Devices', 'Services Installed' shows the key number for my PC, my Laptop & my iphone but under my wife's laptop it says 'Trial'.

Now if I look under 'Services', it shows that 4 out of 5 seats are used, for all devices listed above.

My question is, Is the Norton Security on my wife's laptop actually some sort of 'trial' download that will suddenly stop protecting her laptop?

 

Darryl Metcalfe