Firstly, the MELAIR.COM website is nuts, an ADL flight tonight has apparently left...Airport site is also very inaccurate in terms of displaying the actual flights. There is about 5-10 other departures today to PER,HBA,LST,OOL etc..

There was no departures last night from 1915, so they closed the terminal, I saw this myself as I arrived from OOL on Tiger at 10.30pm last night.

From Experience, Tiger has poor demand on Tues/Wed(especially Adelaide), so not as much action down at T4. No midnight horrors also which might explain the "all planes closed on apron". They were also all there yesterday morning until the morning ROK departure.