How can you be the only one that has bellyached about this ? It makes us look like we lack attention to detail and are just plain sloppy. What a joke. Let me know if you found a work around. I tried to copy the letter to a new version in hopes I could tweak it but no luck.
I don't see any place to adjust the header, and you probably already know this but in case you don't - you can adjust the top, bottom, and side margins if you go to File and Page Set-up from within the letter editing module. I have mine set to .3 on top and bottom and .5 on left and right.