I've had this problem with quite a few quests actually but usually because I was not in a specific "spot". This time, I am standing exactly where the arrow states, not even moving and killing the buffalo soldiers that pass me but none of them are even counting towards bull medals? I have tried running around RR HQ but none of those kills are counting either? I've been on the same quest since yesterday and this is frustrating me. Please, any suggestions please. Is this something I am doing wrong? Or is it possibly a bug?
EDIT: I resolved this by joining a party and having the party members kill the buffalo. It scored it towards my quest, but, I still feel that this is a bug of some sort. Or possibly a problem with my account?