Teleporters can go both up and down.
Yes, but in a way which is pretty counter intuitive.
If there are 3 teleporters:
-the lowest one can only transport you to the top
-the middle one can transport you to the top and the bottom
-the top one can only transport you to the bottom
I think that’s weird. Therefore I avoided that situation completely by using a maximum of 2 teleport pads per column.