Shell-Walker

On the shell walker page and behemoth one

In total it says that are 5 convoy in total but i finded the 5 shell walker one

Do you think that the Shell-Walker have a Better AI than the others HZD machines? Not only is created by Hephaestus but in the base game it is the only one with hands and the only one that when the crate holders are destroyed it take back his crate.