command `wemux users` will only display the same username?

[WinChua]

By reading the README.md, I get the message that command 'wemux users' will output the users connecting to the server now. Something like:

$ wemux users
Users connected to 'wemux':
  1. zolrath
  2. csagan[m]

While, after some exam, I can't report the same output. Here is what I've done.

1. ssh to my machine with two user: UA and UB seperately.
2. In the UA's terminal, run wemux start;
3. In the UB's terminal, run wemux join;
4. In the UA's terminal, run wemux users; The output of wemux users is :

   Users connected to 'wemux':
   1. UA
   2. UA

   While, what I'm expected is :

   Users connected to 'wemux':
   1. UA
   2. UB

   how can i get such output?