I think something is wrong with the biome generator
Code:
[Generator]
Generator=Composable
BiomeGenCacheSize=64
HeightGenCacheSize=64
BiomeGen=TwoLevel
HeightGen=Biomal
CompositionGen=Biomal
CompositionGenCacheSize=64
Finishers=Ravines, WormNestCaves, WaterLakes, LavaLakes, MineShafts, WaterSprings, LavaSprings, OreNests, BottomLava, Villages, Trees, SprinkleFoliage, Ice, Snow, Lilypads, DeadBushes, PreSimulator
MineShaftsGridSize=512
MineShaftsMaxSystemSize=160
MineShaftsChanceCorridor=600
MineShaftsChanceCrossing=200
MineShaftsChanceStaircase=200
MineShaftsMaxOffset=256
LavaLakesProbability=10
WaterLakesProbability=25
BiomalSeaLevel=62
BottomLavaLevel=10
VillageGridSize=384
VillageMaxDepth=2
VillageMaxSize=128
VillageMinDensity=70
VillageMaxDensity=80
VillageMaxOffset=128
WormNestCavesSize=64
WormNestCavesGrid=96
WormNestMaxOffset=32
[Seed]
Seed=351966056
[SpawnPosition]
X=0.000000
Y=128.600000
Z=16.000000
PregenerateDistance=20