Sheriff: Correct. Just click the thread title and you'll be taken to the thread in it's new location. If you get a message about not having permission, then that's a thread that's had to be quarantined out of sight.
Often people post in the general roleplaying forum when the subject is about a specific game or about homebrew. Or post in friendly banter when they meant media discussions. We tend to relocate those by request or when we notice them.