It appears, that when a thread is moved and no one posts in another thread in the forum section it was moved from, it still shows as the last post... Meaning, I guess, that the last post feature registers what post was last made in the forum, and does not overwrite/replace that information till another post have been made in that forum.
So looked like duplicate threads. :P Anyway, the Last Post links both led to the place the thread had been moved to, so all is working, just felt like telling people about it.
I don't think it's an important thing to fix (it's just a tiny glitch), but should it be?
I guess, that the last post feature registers what post was last made in the forum, and does not overwrite/replace that information till another post have been made in that forum.
So yes. I think it happens because no other posts were made in the Tavern.