(Shadow, if an admin merges 2 threads it ends up with adding posts to one thread ofc, but this thread is not marked. So people may not realize that there are new posts in this thread. Can you fix this bug?)
It is a "feature" (bug) of uCoz internal forum system, and I can't do anything about it.
That really shocks my trust in you as almighty webmaster mate... "Teamwork is essential, it gives them someone else to shoot at." Murphy's Laws of Combat #9