But does it matter if I have already got the BF key in Citadel 06 and Citadel 09 before I take the one in Citadel 01?
Because I just got the one in Citadel 01, and it says Battlefield level 2 is unlocked, but the one I got from Citadel 09 also says Battlefield level 2 is unlocked too. (I have already complete dungeon 1 and 2 in BF1)