In the editor the pink/violet tool (next to the wire tool) is the marker to select an area, and the next click or clicks will insert the whole area at the new position like a single tile (useful to reposition like here, fill bigger areas, or copy between different levels)
I did not encounter any problems with wires, even after using it a lot in my own levels...
I did not encounter any problems with wires, even after using it a lot in my own levels...