It was stated by Hellois in the last season that only one Proxy Mk is the Datatracker, regardless of how many you have in play (for example, if the mk3 was your datatracker, you would not get the extra points for doing stuff with the mk5/mk2). So I infer that only that "body" of the Posthuman could use the irregular order.
I don't know why all the hate for this mission. I've played it several times and I really enjoy it. You have to think outside the box to successfully win this scenario. Just my humble opinion. =)