the GB have the correct interpretation and this doctrine is from Jehovah then why are still more becoming anointed after the 1990s when the last of those who saw 1914 died off?
Because you can be anointed without necessarily being The Slave or the overlapping generation. You can be one, two or all three. The GB can be anointed and The Slave without being the overlapping generation. That's why they changed the doctrine from the slave being the 144,000, to just simply being the GB. Eventually like - to my certain knowledge - Ken Cook who was not anointed before The Last Of US them died off in the 90s, none of the GB would be the slave IF the slave was still of the (overlapping) generation who saw the sign.