Yes, that's the all adult weight. The male/female weights are 88kg and 70kg respectively. In this instance using the all adult weight gives a 'weight' 270kg less. Both processes are legal, obviously.
With the final ZFW based on either they would have been overweight so should have spotted it before they'd loaded, everybody, every bag and all that fuel no?
Sorry, you've lost me now.
I haven't seen what an EZY loadsheet looks like - are you saying that they calculate the ZFW using the actual male/female pax split for each particular flight rather than using a standard adult weight ?
If they do, then I agree they should have spotted the overweight in advance.
If they don't, then it's entirely conceivable that the assumption of a typical split would produce a ZFW less than max (as it obviously did), but the addition of the unforeseen males (at 18kg extra for each) would have put them over MZFW or MTOW.