Extremely Poor Mob Spawning.

For some reason no matter what I do to my server the mob spawning tends to be extremely bad. I have a skyblock server so you would imagine in a blank world with nothing in it but a mob grinder that there would be astonishing mob spawn rates, but no. I run the latest version of Spigot 1.8. I've tried changing the bukkit.yml, this always ends up cutting off all spawning for some reason. I was recently trying to test some plugins such as MobspawningSettings and that plugin doesn't work, like at all. I tried raising the settings in the bukkit.yml, plugins, making sure I had everything configured correctly but nothing is working and it's starting to get extremely frustrating as you can't run a good skyblock server if the server won't even allow you to naturally spawn in more than 23 mobs. If anyone knows how to make mob spawning WAY faster or can help me in any way I would greatly appreciate it! If you need any files please let me know.

 

Okay, try the butcher command to confirm the mob count.

Have you adjusted this part of bukkit.yml
spawn-limits:
monsters: 157
animals: 35
water-animals: 5
ambient: 15

another area to adjust is
ticks-per:
animal-spawns: 400
monster-spawns: 2

In spigot.yml,
mob-spawn-range: 6
This setting is in chunks. Lowering the value will lower the maximum spawning range and make monsters denser around the player.

Vanilla behavior
http://www.minecraftforum.net/forums/minecraft-discussion/survival-mode/293097-mob-spawning-distance

Since you say skyblock-- are you at least 24m away from the intended spawning area?

Hope this helps.

 

Yes I did build it 24+ blocks away aha. I changed the files to what you put and it's not changing the spawnrate really at all. Any other ideas?