Hi, I'm Robert and I'll be helping you with your printer question.
What you want to check is the binding or gutter or mirror margin in the page settings
This is a specific feature that is designed to have the same margin on the inside of both front and back page to allow you to bind it in a book. That is the margins are the same on the same physical side of the page rather than the same on the left and right as you turn the page over. If you think of yourself punching holes in the right hand margin of the front page so that you can put it in a loose-leaf folder, you will see that the page offset allows you to do that and still see the text on the reverse