Minecraft – Im wondering, Can your buildings mess with the world seed in minecraft

I was able to find out the seed for my multiplayer world by downloading this program and opening the level.dat, with the program, in the world folder for the world that you are running. When you do that, it will display the seed in the top-left corner of the program. To make sure that it is the correct seed, simply make a new singleplayer world with that seed and check the coordinates by pressing F3. You can then go to your multiplayer world, to see if the world looks the same by going to the coordinates that you checked in your singleplayer world.

Well after much testing I finally figured out what is causing the problem, but I have no clue why this. The only way this dungeon appears is when you play Single Player mode and with Allow Cheats ON. There is no other way you can get this dungeon spawned in.

This actually boggles my mind because I thought these settings had no influence on the actual world generation, but apparently they do.

Also, I don't think there is an option in the server.properties on a server to set this setting, so it's basically impossible to have this dungeon on a server. Only way for me to do this is to create the world in Single player, go to the spot and load in the chunks, and then transfer the world onto my server.