Scenario
User A is watching Node X
User B posted a thread on Node Y, yesterday
Moderator moves the thread of User B to Node X
User A gets an alert stating that "User B started a thread... a moment ago"
I see but it sometimes is confusing because it says that a thread has been posted "a moment ago" when in fact it could have been posted many days back. Imho the thread creation date should be used instead of using the time when the thread was moved as the thread creation date in the alert.
Anyway if this is as desgined well nothing to do here...