I think Number 6 can be right. If you let the baby sleep too much during the day, the baby won't sleep much at night. I think what she is trying to say is don't let the baby sleep too much during the day.
Number 9 is right to her because back in the old days, they fed the baby breastmilk. So the baby would be hungry easily. The mother would feed the baby whenever he cries. But they don't realize that it is a modern world now. Baby cries because of many different reasons.