The game saves your last position in MCServer on a per player basis. After you have changed the spawn location in world.ini, you may want to edit the *.json files in the "player" directory and subdirectories, scroll to the bottom in each json file in a text editor, and see where the server recorded your last position. Alternatively you can completely remove the files and subdirs in "players", but it means everyone who had already been playing using MCServer will lose their inventory.
Alternatively, if you are the admin, login to the game and type /spawn to return to the spawn point you've set in world.ini, and then use /tphere to teleport the other players to your location.
Only completely new players will appear at that spawnpoint set in world.ini. Everyone who's joined the game before that will always be spawning / respawning at the location recorded in the player file.
Please don't remove any files without keeping a backup.
Alternatively, if you are the admin, login to the game and type /spawn to return to the spawn point you've set in world.ini, and then use /tphere to teleport the other players to your location.
Only completely new players will appear at that spawnpoint set in world.ini. Everyone who's joined the game before that will always be spawning / respawning at the location recorded in the player file.
Please don't remove any files without keeping a backup.