1. Thai Airways will be taken more (cheap) 747-400s.
2. Why wouldn't an A380 order have come up along with the A340NG one?
Asiana Airlines seems to be quite a young airline to order such an airplane, even though they have had impressive growth rates in their first years. But they are now focusing on Asia markets and China in particular, which they say is more profitable than intercontinental routes.
ATB - Paris Air Show 2003