>>There is only one survivor list, and it is indeed accurate to the last person.<<
Then why is the passenger manifest continuously being updated? The real passenger list was incomplete and erroneous in several aspects. The list appended to the end of Eaton and Haas' 1995 edition is just such a list. When it came to Titanic, there were plenty of inconsistencies, incongruities, last-minute bookings and cancellations, no-shows, misnomers, slip-offs, incorrect assumptions, missing and/or outdated information, crossed communication wires, even decades of faded or eroded documentation - you name it! Because of this, it would be a virtual impossibility to develop a completely accurate survivor, or death toll, list when we do not know for certain as to every single person who was or was not on that ship in the first place. There were just too many people. Even today new information on passengers and crew continues to develop and come to light. Researchers may be good, they may be thorough, but they are by no means perfect. Sorry.