Its listed as a Mx base so that may be a temp thing... Who knows. I know SDF is served by 9E in the -200s but as those -175s come on line they are obviously taking some of our routes while we get new/different ones.
It's not in the May bid pack anywhere, no company email, no talk around the office, nada... It is going to be a MX base, maybe that's what they heard and they just missed the "MX" part.