[curt.clifton]

This is a known bug (or unsupported feature) as documented by Tim. Use Help -> Send Feedback to cast your vote for proper margin support.

In the meantime, my kludgey work around is to print to PDF then crop the pdf in Preview (or Skim) and reprint from there. It only works for single pages of output, but usually when I'm printing it's to an index card anyway.

Hope that helps.