Stepfather's Passport Name on Passport

Dear Attorney's I am in a confused situation, my mother got divorced form my father during my early childhood and later got married after her divorce. I was with my mother through out all of these steps growing from a child to an adult, although my step father had never legally adopted me through proper documentation, during my passport application I had included his name on my passport and the application process did not include any request of adoption documentation rather considered the divorce and re-marriage documentation to proceed further to issue my passport, time has come to renew my passport for the 2nd time, which means it has passed 2 decades, though my parents after 25 years of their marriage are still considering to make an effort to going through adoption process, I have no interest and desire that they would legally do anything at this point. My main questions are: 1. Should I still include my step father's name on my passport ? 2. If I shouldn't, what is the recommended steps. 3. Was that a mistake in including his name on my Passport.