Drop chance vs drop count

[Kanata]

If the numbers in Vault are correct then there can be drop of some item with chance like 0.7% but amount is 2. Why there isnt rather chance 1,4% and amount 1? The spoil is ok in that matter but drop is just weird.

[Teclis]

It may seem like it is weird, but on l2off items are in groups and these groups have various chances. So when you kill a mob, first the chance of the group is evaluated. When positive, chances within the group are evaluated and 1 item inside the group is selected and dropped. So if the group chance can be multiplied without overflowing , it is multiplied. If not, then either drop amount is increased or group is replicated, or combination of the 3 so that the best balanced scenario of 16x is achieved.