WebLab uses server sessions to maintain your details when you first login - basically, it remembers who you are and what site you are working on when you login and start editing a site.

If you then browse to another website in a new window/tab in the same browser (which is also hosted in your WebLab software), WebLab still see's this request under the same connection as the page you are editing and so uses the site information it currently has in memory to show the site .  This makes it look like the other site has been replaced by the one you are currently working on.

This infact is not the case, but in order to view a different site in the same web browser you are using, you must either:

• logout of your existing editing session before browsing to another URL
• close your browser and re-open it, so closing your connection with WebLab and releasing the editing sesssions.
• use another browser to view the other sites in your WebLab environment