Hey, thanks for supporting!
If you use Winrar, what's supposed to happen is that it unzips both parts at the same time, that's why when you open them they appear exactly the same. If you end up not being able to open any tracks, let me know and I'll split the parts in a different way.
I will take a look at the pack and if the vocal track is missing, I'll add it in. Thanks for letting me know!