So I was trying to add my wife's account to my echo., I have three other dots in my house and they're all part of a group called everywhere.
I wanted to add her account because I wanted to have her be able to use trackr for when she daily loses her phone and I want to have that feature for my phone as well.
So what I ended up doing was created an account and added that account to the dot. So the dot has two user me and my wife.
When I tried to run my everywhere group I noticed that my dot with the two accounts wasn't playing music.
I made sure I was in my account on the dot and then when I deleted the everywhere group and added a new group I was only able to join two of the dots but not all three.
Not sure what the limitation is.