1985 Donruss Error Cards?

[Old Braves Fan]

I just came across some strange 1985 Donruss cards. They are black & white and look like proof cards, but the fronts and backs are different. I've included one here. Front is Steve Yeager but back is Roland Biancalana, Jr. I have a second card with the same Steve Yeager front but with a Robert James Reynolds back. Three of the cards have the same Cleveland Indians player on the front, but each has a different back. These are very strange. Any ideas regarding origin, rarity, value?