Two CD-Keys

Alright, I currently own the original Guild Wars, and I've bought Factions. I know that adding the Factions key to the account will only give me two additional slots.

After adding the Factions key, will adding another Prophecies key to my account
give me another two character slots or will it not. I've been told that it might not be possible to add another key since I already have the Prophecies campaign under my account. Is this true? Thanks.

you cannot add a second key of the same chapter to gain more slots

Alright thanks.

BTW if you want more character slots you might want to buy soem from the Online store, its 10 bucks a slot,that might be what your looking for.