You have to understand you're not alone, if your extension doesn't work with others, there's a big problem. I say that because with CB, CBSubs, Groupjiv...etc we encounter too many strange problem. All other component works very well, and if we have problem, we can solve it.

You have to understand I can't fix what I can't reproduce. Our live demosite is unable to reproduce it and 2 local installs I work with (development and testing) can not reproduce this.

As you're using a live production site with a large active userbase I can't investigate it either as I would be toggling extensions on/off as needed. Clone your site and PM login credentials for the clone and will investigate further. We are not responsible for 3rd party extensions aggressively taking over standard behaviors and breaking things. Wall save is just a simple HTML form POST.

I would want to sort like facebook, the newest in first... Is it possible please?

The wall always shows the newest first. Default ordering for this is Date DESC within CB GroupJive Wall > Parameters > Paging. Are you saying changing this breaks the wall?

For sorting, groups are sort but not messages...

So that parameter is doing nothing? The wall always is sorting Date DESC regardless of what you set it to?

Do you know how to rewrite url from groupjiv?

CB plugins don't have routing at this time. So you'll have to make custom rewrite rules in 3rd party SEF extensions. We'll eventually implement it so plugins can extend CBs router and be rewritten nicely.