I did find an issue with callSign comparison when comparing SPs. I've fixed it for next release. As it is now basically the callSign is being ignored so it doesn't matter if it's different or not. In next release you'll be able to schedule SPs with same title but different callSigns. I confirmed the fix using "Cosmos: A Spacetime Odyssey" series which currently runs on 2 different Fox channels in my lineup and I was able to create SPs for both using kmttg.