Just due to a mix of signs of translations along unit cells.
Try the following lines:
coor fractionalize end
vector do (x=sign(x)*mod(abs(x)+10,1)) ( all )
vector do (y=sign(y)*mod(abs(y)+10,1)) ( all )
vector do (z=sign(z)*mod(abs(z)+10,1)) ( all )
coor orthogonalize end
Replace them in "unitcell.inp" (Page 269 Manual 3.1).
Jiansheng Jiang.