Do you have a scan of one as reference? I have a feeling something's getting misinterpreted.
Hard though it may be for some people to believe, there are actually old dinosaurs like myself and many others here that were actually, like, HERE when TMS originally aired. Back in those exotic times when most tv sets only had 12 channels and you actually physically got up to the set itself to change a channel or turn it on or off! We lived through it. We can CONFIRM all those funky things about what the show was like and the airing patterns and the original Zoot closing and the ITC logo (with that majestic music!) that appeared right before and after the show was on!
But one needn't take our word for it. If you really really wanna know all the stations that aired it, i'm sure you can spend lots of jolly fun time in your library going through historical tv listings and seeing what stations aired the show and what their affiliations were (or weren't) Happy hunting!