I am having very strange mob spawning issues on my server. While in game, the difficulty is displayed as hard mode, but I very rarely see any mob spawning. NOTE: "VERY RARELY, NOT NEVER". When I viewed my server config options, it said that difficulty is peaceful. So, I changed it to hard, HIT SAVE, and restarted the server. Mob spawning was not fixed, and the config files, when reloaded, said that difficulty was back to peaceful, even though in game it was hard. What is going on? How do I fix this?