It is interesting that the referenced standard says neutral must be between forward and reverse, but doesn't say which one should be on which side except for steering column mounted shift levers. I certainly remember driving some of those, but I think it's been quite a while. My guess is, though, that quite a few people would have screamed if the column-mounted order was PRNDL, top to bottom, and they switched to a car with a transmission tunnel mounted shifter that was LDNRP, front to back.
Given that every tunnel/console mounted automatic shifter I've ever used was PRNDL, front to back, presumably for that reason, It would have seemed very odd for the LEAF to have DNR instead of RND.
Ray