The 1950 census recorded who was living at the residence on 1 April 1950. I see from your Wikitree bio that your birth day was the 4th of April. According to the rules given to the enumerators, you should not be listed on the census. It is great that you have an indication that you were there when the enumerator came by. (There should be a date on the top of the page indicating when the information was taken.) I think you can use this as a source, for you can see your name and the date the information was gathered.