The cards were printed twice. 
When you orient the back so you can read it and flip the card over 
(so the back is still oriented the same) the title of the cards can be found 
either on the right hand side (first printing) or left hand side (second printing). 
All card can be found both ways. Some of the second printing cards also have some colors added. 
The second printings are slightly harder to find. The card stock is very thin and wears easil