When these were first written she was writing about the dying process. They were never meant to be taken as a formula to follow one right after another in a linear fashion with an end in sight.
It is not a path were once you check in at all of the locations you are finished, rather it can help you understand that most of what you feel during grief is normal. Take a look at http://www.ekrfoundation.org/five-stages-of-grief/ to learn more.