Nostalrius Begins - Quality wow vanilla realm (1.12)

I have problem with psychic scream spell on my priest. I have improved psychic scream talent, so it should have 26sec cd, but it still has 30sec cd. I tried to retalent, deleted both DBW and WTF folders, i even downloaded new game client from nostalrius website and disabled all addons, it still has 30sec cd. I checked real cooldown with stopwatch and it is really 30sec, so it is not a tooltip message error. What else I should try to fix this problem? I asked other priests with this talent and it works fine for all of them, so it seems it is just my character bugged somehow, help please.

Also psychic scream is somehow only spell that does not show cooldown remaining after use.