Are we only allowed to add ourselves to so many friends lists?
No, you can add yourself to as many as you like. The reason it wasn’t working when you tried was because it was broken 🙂
P.S. Please add yourselves as a friend of Deardiary1 so that you can get notifications when something on the system changes. I had 97 people on the notify list before this changed. There’s now 3 🙁