What was your point again about SETI? Whatever it was, you just shot it down.
How again do you think we know such a signal would come from an intelligent source, and how does that help us determine that DNA is designed?
Intelligence implies order. Period.
Your reasoning has come full circle. You said before that the order of s SETI signal would tell us there's intelligence behind it; now you say we know that because it's intelligent in origin, it must be ordered. You can't have it both ways.
They are assuming the narrow band waves are communications form intelligence. Non-life doesn't communicate. The narrow band waves are, in effect, an an ordered communication, otherwise they would not consider them to be from an intelligent source. My argument stands.