Got a question here.

[Lightning Count]

Me and 2 of my mates were playing D2:LOD act 2 nightmare, and after killing radamant, he dropped 2 horadric scrolls (!) which did not dissapear from their inventories even after talking to cain. What i wanted to know is whether this was a bug or something? Also, going through normal, nightmare and hell do you actually get 3 horadric cubes?

[AnimeCraze]

Drop the scrolls, they are useless. Also, you don't need to get the cube in nm/hell.

[HardyTarget]

Also, going through normal, nightmare and hell do you actually get 3 horadric cubes?

No, you can only pick up one.
Just skip the cube quest alltogether and aim for the staff/amu.

[Lightning Count]

Anything else i need to know about going through the campaign?