Not to hijack this thread, but I’m having the same issue. In my case they are cloned virtual machines, but the names of the computers are different and they are located on different public IP addresses. I’ve been fighting this for days and just realized tonight that the Avast Dashboard thinks I’ve just been renaming the computers, so the last one I happened to reinstall wins the race of being in the Dashboard, but then others disappear. Waiting an hour or even more than a day hasn’t helped.