Just doesn't make sense...

As Im washing my hair in the shower...my hair is the type that is super poofy wether I blow dry or when it's done air drying. With that being said, I have to use shampoo AND conditioner. If I'm feeling frisky I will even use a leave-in conditioner! Anyhoo, as Im lathering up my locks I looked at one of the many half full bottles on my shower organizer and read "2-in-1 shampoo & conditioner." Hmmmm, I thought to myself...wouldn't the shampoo cancel out the conditioner? If there really is conditioner in that bottle, wouldn't the soap eat it up? Im confused. Very intriuged I must say!