Mangas are not printed backwards. They are only backwards when they are flipped like they used to do. The proper way to enjoy a manga is right to left, it is the way the artist intended.
If you don't read manga regularly it gets hard to get used to at first but believe me i prefer my manga only translated, no censoring or flipping the image is wanted.
In other words the Dark Horse Releases are printed Backwards i know because Pablo Hidalgo i believe did an article once where he used images of the preferred japan release with the images matching the films.
Dark Horse no longer flips or flops its manga, though perhaps it was done at the request of Lucashfilms i don't know