lol
nah to be real with you to my knowledge its the same thing u thought, like those are just extra zips, make sure you got them all though, usually theres one at the end that isnt a zip or it dont follow the same format..basically all i can say is make sure you got all the parts and theres no extractor
you could also attempt to unzip them all one by one (like change z01 to .zip, unzip it, and so on)
but more than likely youre missing a zip or one didnt finish all the way