On the home page, the 'T' button next to the flyer button displays text that goes on the back of the flyer.
For the full page landscape version, it is intended so the flyer portion is taped on the inside of a merchant's window, and the back is oriented so customers can read the back. Getting the correct orientation for this can be tricky.
It might be best to print the front and back pages and make them the masters. Then take the masters copy them in a conventional way.
Another approach is to tape tack the front and back together. Double paper is sometimes needed to stop the light from shining through.