Obviously, the whole purpose of moving a sub-thread elsewhere with the "Create as new topic" (possibly in another forum) function would be defeated if you got replies *to the place-holder* that directs you to that newly created topic (i.e, below the placeholder in the original thread, in stead of in the new one).

Those place-holders are the only posts I've seen that have been locked; are you sure you've seen any other kind? (At a guess, was it my three replies to Norm earlier today you saw? I pre-redirected those to the Flame forum.)