The page printed after the cover page is not really a second page, but a continuation of the cover page. The listing of User, application, and date is the "caption" and can be disabled in the "Fax Destination" dialog.
The caption should really be printed at the bottom of the cover page, but there is a problem in the driver that miscalculates the page length and produces the second page. This problem can be fixed with the LaserWriter Fax Tune-up. You can get the LaserWriter Fax Tune-up from online services Apple publishes software updates on.
These articles can help you locate software updates mentioned here:
Where To Find Apple Software Updates
Lists online services for "free" Apple software updates
Obtaining Apple Product Support in the USA
Lists 800 numbers and online services for software updates, Apple
support information, and a subset of the Apple Tech. Info. Library