relocating dish - keep local channels

[snocrazy]

I have a dish 1000plus dish. (110-119-129)I had it installed in chicago area. I then moved it to up michigan close to munising. I get all of my local hd channels. I do not get wgn or wciu (cubs - whitesox) Is this because of not being able to see certain transponders in MI that you can in IL? I think there are also a few other local chicago cahnnels that dont come in either.