Possible the person who purchased and paid for the tick. Had a different last name , at the time of traveling something came up and couldn't travel...so they sold under the same name
Once u were on the boat , no one checked and if they did u would give them money, a piece of Jewlery,
Everyone knew how important it is to be away from the home country
When arrival in usa, entered by the tick.
No judgements
Have u tried to contact IASI, ARCHIVES, to get a birth certificate under the MOSCOVICI last name?