And I also agree this: "do not change the scope of the ticket". But the problem here is the manager didn't understand the "scope of this ticket". His developer is either not familiar with the code or missing it. Initially she even told me a wrong place only corrected it after I pointed it out. As for No.2, their violation (just a line of code) has caused and will caused even more bugs ahead. As a responsible manager, he should at least ask to log another bug if he cares about the "scope". But his attibute is like "he doesn't care if there is a bug in the product as long as he hasn't got caught". This product is not out of door yet, why does he want to leave it to the customers?
Oh well, I can care less about the products especially not my products, maybe I should have done that, then everyone will be happy except maybe the customers or CEO.