Well this may all be true but think of this it may be just a coincidence i mean different types of deoxys would need different stats [1 out of 6]and the fact that there was the original [normal as deoxy55 put it], then one with a defense bias and one with an attack bias means that it just so happens that it turned out with these stats initials.
In the end this is really caused by the fact that defense - D, Orginal - N, Attack -A just so happens to spell DNA.