Im not sure what caused that but if you give me the save file and tell me where it messed up, that would be greatly appreciated.
I have isolated the problem.
If the datablock of your brick is not found (some add-on not enabled), I designed buildbot to handle it like a man and deal with it.
However, with the latest update (v1.2), where you can load bricks from any direction, some code became unexpectedly unable to properly handle the error. I am not sure why it offsets the brick's location, but I have found this to only occur due to non-enabled bricks.
This will be fixed in update v1.3