Is New Grant Deed Needed After Quit Claim

The grant deed that was recorded when the house was bought listed 5 people as joint tenants in California: my mother, my father, my older sister, her husband and my younger sister. Two months later, a quit claim was recorded where it specifically stated that my mother, my father and my sister's husband relinquish and give their shares of the property to my two sisters. A revised grant deed listing only my two sisters as the owners was never recorded. My mother has since passed away, and my father has re-married. Two questions: 1) are my mother, father and my sister's husband still considered owners of the property? 2) My sisters want to add my name on it. Is it necessary to get the signatures of my sister's husband, my father, and my father's wife in addition to my sister's? Thanks for your help.