Importing world - no human changes

Hello all, this is the third time updating this because I don’t want to make a new thread for every question, especially since I’ve managed to solve the last two on my own. I can successfully copy over my old server world to mineos and run it, and all player data: hp, facing, position is exactly the same. The landscape is the same too. Same exact world, except for the fact that there is no man-made changes. No structures, broken blocks, anything. Any Ideas?