If it's the only one updating monthly, then that's probably why it's the only one you get an alert for. If the balance is still figuring into your utl I'd assume it should cause a score change for you, but it depends on how they're reporting as to whether or not it counts for your Utl. Right now they're reporting CO'd for me but they do show a balance that is due, so it's hurting me pretty badly, I just don't have the cash to handle it yet.
I really can't tell you why TC's sending you updates on it though since I don't get any for my cap1 co