Spexticulare

Okay, so I was importing a schematic into world edit via the file manager, when I logged onto the server to see that is had completely reset. The seed was different, my base wasn't there and nor were my server mate's. I had recently changed the name of the server as well as some other internal settings like, enable command blocks, force gamemode, and changed the world name. Does anyone know, 1 How I can rollback my server if possible (The last backup was post reset)? 2 Why this happened?