We never specified the specific order in which figures of the same group, or figures that use the same Initiative Card spawn. We’ve added following Important Note:
“Important: When Spawning figures, players always start with the lowest number figure available. For example, if Cave Sickle 2 & 3 are already on the table and you are instructed to must two additional Cave Sickles, you’d spawn Cave Sickle 1 and 4.”