I just went ahead and modified my page with a different way to access the chat client staying on site. At first I thought a pop over, but that is too limited so I just redirected to a page with only that and much larger than what it was. I'm satisfied and the most important thing of all is that the WA CSS FB works like a charm.
Now to work on using the other more powerful extensions.
Thanks for the effort you put forth on this issue.