CAPA has used an eclectic mix of regional definitions:-
They do indeed:
In Asia Pacific, all LCC widebody flights of more than four hours are counted. In Asia the four hour rule typically distinguishes between a short haul and long haul flight for those LCC groups operating widebody aircraft. There are narrowbody LCC routes within Asia Pacific of more than four hours, but those are not generally considered long haul operations and therefore are not counted here
So Jetstar SIN-TPE is short haul and Scoot SIN-TPE is long haul !! From a passenger perspective the opposite is almost certainly the case.
I do like the FLLH categorisation, although perhaps that should be FCLH (.. the longer the better )