Yeah, for what we collect it is usually a flipped sheet in the press. The card will often have an upside down back:
I am collecting a 1948 Leaf boxing wrong back set and the same cards always appear with the corresponding fronts, i.e., the Benny Leonard has the John L Sullivan back and the John L Sullivan has the Benny Leonard back.
FWIW, PSA won't slab these kinds of mistakes but SGC will [PSA kicked the part of my recent order that included a wrong back 1962 Drysdale and some other wrong backs and blank backs].