make weight calculation deterministic, fixed issue where weight could be different far after comma
make weight calculation deterministic, fixed issue where weight could be different far after comma

PatrickRWright/CopraRNA,PatrickRWright/CopraRNA,PatrickRWright/CopraRNA,PatrickRWright/CopraRNA,PatrickRWright/CopraRNA,PatrickRWright/CopraRNA