In the setup like in the image (I'm facing east) or in the .schematic the command blocks in the middle row facing east and west aren't executing their command. I tried it at different locations and directions in the world, but nowhere it worked.
Additionally, when triggering these commands in the chat they execute as they should. Otherwise as I tried it with a different command, it also worked as it should. (not /execute but /say)
Also as I looked into MCEdit I noticed that every command block has one tile tick at its position but exactly these six command blocks, which don't execute, don't have one.
If it is a bug in block updates or in commands or the selector I don't know.
The commands are (ordered by ascending x or z coordinate):
facing east (not working):
facing west (not working):