Originally Posted by Scissor Queen
Having both the top and the backing pieced can make quilting difficult.
All my backs are pieced. "Creatively." ;-) Never had a problem.
And as long as you're not trying to "exactly" duplicate the setting on the front, then you don't have to worry about "matching" up.
But if you leave enough room for your design/layout on the back to float a bit, any longarmer should be able to make it work. And if they can't, find a new longarmer.