The LaserWriter 8 and later drivers let users specify whether a cover page is or isn't printed with each print job. The information you provided in your request indicates that the cover page feature is turned on. Once selected the buttons will remember a setting from the previous print job.
To modify the settings, select print from the File Menu within any application, and click the Options button. The very top option determines whether there should be a cover page, and whether it should print before or after a print job. Click the None radio button and cover pages will no longer print.
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