The point is that it is better to use the English Hell and Grave than the Hebrew Sheol and Greek Hades; as these can mean both Grave and Hell as we understand them. Since we do not read the ENTIRE text in Hebrew or Greek disseminating the intent can be difficult. Instead we separate the meanings of the two and use English Words (it is an English translation).
That is the extent of my ignorance that is breathtaking!
PING for more info.....