Nutterie

found the griefer

So me and my friend have a private SMP server, it is just us. We don't use command blocks, commands, or anything beyond /home and /tp. But for some reason, our server just became totally messed up. It's not the first time, either. Last time this happened, I had to download the world, reset the server, and reupload the world. This time, I can't even download the world, so we are kinda screwed. We can't even join anymore. Last time it happened, the world was even super laggy in single player, so I transferred over only the region folder. What else can we do to fix this?