I have an old MBP (running El Capitan) with the home folder name: firstlast (that's made up, but you get it). I just got a new computer, and during setup it suggested "firstlast" again as my home folder, and I hesitated, but moved forward with it. So, I have two different apple computers with the same home folder and user account name.
Today, on the new machine, I set up Filevault and used the iCould choice for the recovery key (which I know means I set up iCloud to be able to reset my computer password). I later changed my new computer password to a stronger one. Then I wanted to change the old computer password as well. When I turned on that computer, I got the ? blinking folder. After some work, I got it going, and when I tried to sign in, it wouldn't take the old password, but it took the one I set up for the OTHER, new computer. It seems that maybe iCloud changed it on the old computer in the background?? It's kind of freaky.
Anyway, my question is, do you think it will screw things up if I change the home folder name on my old computer to something else, like "flast" instead of "firstlast", so that the computers have different home folders? I feel like having two computers with the same home folder name is asking for trouble... (a bit of which I seemed to have today!)