Never having used the shortcuts that surprises me too.
Is it an admission that for English speakers the right to left order is not intuitive?
Right to left is an easy rule to learn (which follows easily from the principle that left inlets are more likely to be hot, though Max breaks this rule in places).
What surprises me is that it's a nearly ubiquitous rule but this editor feature violates it.
Or is it because of the order of creation of the number objects?
The video shows the same strange behavior. That would be a remarkable coincidence if I had accidentally created objects in the same order as the video... But I might be retest with different orders later.
With the information available to me now, it looks like a bug.
@oid: "there must be some sort of logic, can not believe this has just been over looked for all these years"
The same behavior is plainly visible in the video, so it's been overlooked for at least as long as that video has been published.