When you open a separate tab in a capable browser, it uses the same set of cookies as the first tab. This can cause problems for sites like http://www.floridabuilding.org.
The main problem with using multiple tabs to browse this site is that the server can't keep track of what you are doing in both windows. This causes problems when you are trying to work on one item in one tab while viewing another item in a different tab. The server can't keep straight which one you are working on, and often this causes problems when trying to save information.
The simplest way to work around this limitation is to open a completely different browser window if you need to have multiple instances of http://www.floridabuilding.org open at the same time.
To make sure you are running in a completely separate window, always open a new web browser by clicking on the icon from your Desktop, Start Menu, or whatever other mechanism you would normally follow to open your first browser window.
Don't use the File-->New Window or Tab features of your browser with http://www.floridabuilding.org.