Scam??

Why is it that in the game it asks me to purchase episode 2-5 plus episode "400 days"(bonus episode) for $20.00??? But then when I go to pay for each episode individually they are only 0.99 cents... So thats $5.00 V.S. $20.00… whats the deal with that?

JerryAlvin about Walking Dead: The Game, v1.10