I remembered I logged into my account on October 26th, nothing happened at that time, but yesterday there was an update. I keep logging into my account every 2 or 3 days during these days, and I don't have any logging problems.
In terms of the ghost updates, I remembered I have read some posts somewhere in this forum, and it said ghost updates usually come with an email notification, but I am not sure about it, so this is the reason why I put this question on this forum and hope someone could answer it.