Got a decent deal on a AONE6 ticket from Asia, so went ahead and booked it. I've read the change rules a few times, and I just wanted to confirm my understanding. If I want to change the ticket:

1) before departure, considering in my case it was slightly discounted, I must assume the fare in effect at the time will be higher - so I will have to pay the difference - even if I'm only changing dates, not routing?
2) after departure of first flight, I should be able to change anything, even the routing, for the $125 service fee? (as long as I am within the original ticket rules)

Thanks!