Genesis 1:24 And God said, "Let the land produce living creatures according to their kinds: livestock, creatures that move along the ground, and wild animals, each according to its kind." And it was so.
It would seem you are equating the biblical kinds with the species level. That is not a correct creationist understanding of the created kinds. You might want to give the following a quick read, as it points out what creatinists mean with respect to “each according to its kins.”
http://creationwiki.org/Created_kind
“Transmission and propagation of infectious retroviruses among the host population could have helped in maintenance of the endogenous viral sequences via recombination, in a way similar to recombinational DNA repair and modern gene therapy. (Indeed, retroviruses have been used as the classic vectors in gene therapy because of their ability to integrate into host chromosomes.) Interactions between endogenous and exogenous retroviruses may have been perfectly regulated at the time of creation.”
For more, see:
http://www.answersingenesis.org/articles/am/v1/n2/were-retroviruses-created-good