avast account screen indicates 3 devices; I only have one computer
my last update check from my machine indicates that last update received was 8/15 , indicates all shields on
but on the devices listed at the account website online; "My avast "
1) last communication 5 days ago - Firewall and DNS shields off
2) last communication 6 days ago - all shields on
3) last communication 1 week ago - all shields on
How are devices created ?