Fix a few bugs and generate good configs

config/gc-d_10-l_20000-c_0.json

config/gc-d_10-l_20000-c_1.json

config/gc-d_10-l_20000-c_10.json

config/gc-d_10-l_20000-c_5.json

config/gc-d_100-l_20000-c_0.json

config/gc-d_100-l_20000-c_1.json

config/gc-d_100-l_20000-c_10.json

config/gc-d_100-l_20000-c_5.json

config/gc-d_15-l_20000-c_0.json

config/gc-d_15-l_20000-c_1.json

config/gc-d_15-l_20000-c_10.json

config/gc-d_15-l_20000-c_5.json

config/gc-d_2-l_20000-c_0.json

config/gc-d_2-l_20000-c_1.json

config/gc-d_2-l_20000-c_10.json

config/gc-d_2-l_20000-c_5.json

config/gc-d_20-l_20000-c_0.json

config/gc-d_20-l_20000-c_1.json

config/gc-d_20-l_20000-c_10.json

config/gc-d_20-l_20000-c_5.json