I was looking up some information related to our December stay, which involved rented DVC points.
Anyhow, in the confirmation email from Disney, there is some fine-print information. But here’s something interesting I hadn’t noticed before:
What’s the story? Is this just a “mis-story” and it doesn’t matter (which I believe is the case), or is there some legitimate reason for not having multiple MagicBands assigned to the account?
This has been a “thing” for a few years. If you have multiple ACTIVE magic bands it can really glitch your account. (Basically glitch Disney IT and magic band touch points). I Think the magic number has been three…but I’ve always deactivated all my bands except 2 per person. I usualy bring our newest band as well as the most recent band after that with us, and deactivate the rest and leave them at home.
I had 5 active on my last trip and the only problem I ran into was occasionally having issues open the door to our room.
So the second band per person is just in case the first one is lost or malfunctions?
Yes. I always bring a backup band per person. We use those buddy band things to help the strap stay on - however I always like a backup just in case we lose one. It’s much simpler to have one on hand than to wait at guest services for a new, boring gray one. 
Wait a second. A couple of us CHOSE boring gray ones! Err, I mean, chose gray ones! That doesn’t make us boring.
Does it?
My apologies. It makes you; classic, traditional. 
I loved those bands for the peace of mind, especially with the children. I didn’t feel like I had to obsessively check (as often) that my band was still there.
Yes. Yes it does.
Last time we went, I got DH the gray. Not sure I can fully say it doesn’t speak to boring. 
The newbies who joined us at WDW last year are fairly newly married, and liked Lady and the Tramp for avatars. So they got a yellow band and a gray band, of course.