Might've been a publishing error

Why are part 3 and 5 of this not listed as Single Player?

The magenta and white can be solved by turning Shader Detail to medium in graphics.

All four members reached the second safehouse and loaded in to find Coach dead. The AI pathfinding is pretty shocking (walking off ladders, falling to death etc - though I suppose you can't really be blamed for that) and the graphics are even worse. The first three levels are a magenta-and-white headache.

I can't really enjoy a game when gantries are selectively solid too; can't throw a pipe bomb through the railings but a smoker can shoot its tongue down through one? How does that make sense?

Textures dont load properly its pretty bad