The paper our Australian designer used is A4--commonly used in Australia and other countries. It is slightly different from 8.5" x 11", the US standard.
One of our members, BleuRose, just posted that she changed her HP printer setting to A4 paper instead of "Letter" size, the US standard, and it worked perfectly.
I just checked it with my HP printer and got the same result--perfect 1" box.
I can't guarantee this will work for everyone and every print, but if you still have a printing problem, try this if your printer has an A4 setting.