"Error, /who limit of 50 exceeded. Please narrow your search down and try again"
That should not occur." and "on me:*:JOIN:#:who $chan" They are both of what xChat Uses

xChat every 5/10 seconds issues the server with "who *" and processes the output when rendering the userlist.

"alias in your back you do not even checked that you are away if you're not, you will become so used away "
There is no use playing about making it show yourself as away when in the next 5seconds it picks up the fact you are away too and adds you to the list.

As for the rest of what you said I can't understand what you mean. Check your grammar :)