So I was trying to build a door that disappears when you approach it, using the new /setblock command. So the command I used was /setblock -1559 67 1403 0, but instead of setting the block there as air it set the block 2 blocks to the east to air instead. so I had to set all the commands to be 2 blocks west of their actual location ie. /setblock -1559 67 1403 0 needed to be /setblock -1561 67 1403 0 to work

The seed of the world is -4320077163717258200 and world type was superflat redstone ready preset, the spawn is at x;-1554.5, y:56, z:1391.5, facing south