Thanks for your reply.
Following are the result of my last 100% olive soaps result :
1st - 50g olive oil, ph 8~9, double-boil for 90 min.
2nd - 100g oo, ph 8~9, DB for 90 min.
3rd - 100g oo, ph 8~9, DB for 90 min.
As per the above result, I wonder whether I mis-weight lye quantity...