I'm wondering the exact same thing. At this point, I am planning on sending an addendum telling them just what you said (but to another school). I don't know if that will be enough? I think this will really help us because I don't think many people go through the trouble of letting them know that they will go no matter what, especially if it is a Tier 2 school.
I would've done ED to my school if 1) they had an ED and 2) I had taken my LSAT earlier.