You want to position the paper so that it will cut in the same place each time
Be sure that the box by Advance in the Cutting Control Panel is NOT checked!
Usually you will start cutting your project with the paper extending 1" in front of the wheels. This is in the middle of the gray cutting strip. You can use a permanent marker to draw some lines to help with alignment. Or, if you are using the cushioning strip, you can make your marks in it.