This is not an error of duplication. The full-fledged version of this Mitzvah are many and change for those who are learning the one/three chapter a day. The Message for the day from "Bringing Heaven Down to Earth" at the end of this Mitzvah is different than that of yesterday.

Positive Mitzvah 107: Impurity of coming in contact with a Dead Body
Numbers 19:11 "He that touches the dead body of any man shall be unclean"

Contact with a dead body makes a person impure.

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In your world, all that exists is your Creator and you. In the world of your neighbor, all that exists is his Creator and him. And his world is just as true as yours. In the world of a cow, there's just it's Creator and it. So with an insect, so with a plant, so even with a rock. Every seat of consciousness constitutes a world. And each world is true. Knowing this is also part of your world: The knowledge that in the other person's world you are only there as an accessory, an interface by which he connects. And now you know how to enter his world.

From: Bringing Heaven Down to Earth by Tzvi Freeman - tzvif@aol.com