Floating islands???

So after updateing my server and travaling I found a village with my freind and there was floating islands. I have never seen this but I feel like it was also corrupt beacuse my server has shut down a lot due to power going out in my area. if you want to check it out my server ip is Survivalcraftt.us.to and please tell me if this is a bug. Also the qoords are 1167  70 -596 Thanks!