Library priority list ?

1 = Does it matter how high or low an addon is in the list?
2 = What do these 11 entries mean/stand for?
[TERRAIN]
TERRAIN_ERROR_FACTOR=96.000000
TERRAIN_MIN_DEM_AREA=10.000000
TERRAIN_MAX_DEM_AREA=100.000000
TERRAIN_MAX_VERTEX_LEVEL=20
TERRAIN_TEXTURE_SIZE_EXP=8
TERRAIN_AUTOGEN_DENSITY=5
TERRAIN_USE_GRADIENT_MAP=1
TERRAIN_EXTENDED_TEXTURES=1
TERRAIN_DEFAULT_RADIUS=0.000000
TERRAIN_EXTENDED_RADIUS=0.000000
TERRAIN_EXTENDED_LEVELS=1
I was wondering if changing any might solve my disappearing objects problem.... :-?
2 = What do these 11 entries mean/stand for?
[TERRAIN]
TERRAIN_ERROR_FACTOR=96.000000
TERRAIN_MIN_DEM_AREA=10.000000
TERRAIN_MAX_DEM_AREA=100.000000
TERRAIN_MAX_VERTEX_LEVEL=20
TERRAIN_TEXTURE_SIZE_EXP=8
TERRAIN_AUTOGEN_DENSITY=5
TERRAIN_USE_GRADIENT_MAP=1
TERRAIN_EXTENDED_TEXTURES=1
TERRAIN_DEFAULT_RADIUS=0.000000
TERRAIN_EXTENDED_RADIUS=0.000000
TERRAIN_EXTENDED_LEVELS=1
I was wondering if changing any might solve my disappearing objects problem.... :-?