World Again... -_-

I downloaded flat world by cirby and the world seems a bit buggy. I finished the tallest elevator you could build in MC and after a few days, the wiring and some repeaters were gone and there were blocks instead! So I had to go over and fix those

There is a way to fix this world bug or which flat world should I download?

A temporary solution would be world edit
u could mark the area and the type in //replace unwished_block_value redstone_value (55)

make a new world in MCEdit and select everything and delete it then make a large flat area of nothing but dirt, and if you wish make a border of bedrock around the whole thing, then add your elevator