Hi,
My understanding of the system (but i can be wrong) is that an Airline need to plan long time before and what appears in the Changi website is the long term schedule. Today 16th of August Tiger was planning 27 flights, they cancelled 2 flights long time ago 2104 to Bangkok, 2908 to Macau and cancelled 2454 to Kuala lumpur recently for operational raison. 2104 & 2908 were not in Geneva but 2454 was.
Out of 27 flight, at this moment of the day Tiger will flight only 24, 3 cancellation for today.