I reported this in another bug report but the mod who answered had a brain fart and forgot which report he was replying to (or read the summary only and none of the message and completely misunderstood). Called it a duplicate of something completely unrelated in any way.
When using xyz coordinates and range the space affected can't be shrunk to 1 block. A 3x3x3 globe is the minimum size. This makes sense if a command block is the center of the globe but not if a specified xyz is.