We are happy with the design, but unfortunately the frames were not square so we could not hang them side by side.  We decided to stagger them so it was not be so obvious.  We hung the right one first, as it was the straighter of the two, making sure it was level and straight and then hung the left one.  The distance between them is exactly the same from top to bottom, but as you can see in the photo, the left one is not straight.