I need help! On the server I play on, I have precious stones permissions and my town is in a plains biome. Well, I wanted to make a little forest in it so I put down a mild forester block. Trees started growing as normal, but two huge chunks of my town flew up 15 blocks into the air.

Anyone know what's happening and how to fix it?? I'm not an op, and the op is angry with me. Please please help! The server ip is minecraftfreedonia.net and the town is called Turin.

Please, please help! I have no idea how to fix it and the op certainly won't go to an older save.