Correct, when a post is moved a re-direct is left in it's place for approximately a week or so to allow for users to find the new location of the thread. Clicking on the re-direct (where it says "moved: thread name") will automatically take you to the new location for the thread.
If a thread is merged with another thread, the origional poster will generally recieve a private message from the staff member who made the merge, to notify that this has occurred.