As a workaround what I did was, I copied all the KSICS frequency on to on an excel spreadsheet and then removed the duplicates frequency from it, then I added back into the Sentinel Software and uploaded it to my HP-1. Please note, I update the frequencies as new information is upload in the RR Database.
Then I set the Dispatch talk groups I want to listen to as I'm traveling thru out the state, it works great going from Central KS to the Kansas City area no matter whether I'm on I-35 or I-70, or any of the State HWY's as I lose signal from the CC channel and pick a new one it switches seamlessly.
There is no Yoder tower. The closest KSIS towers to that area are Partridge SW of Hutchinson, the Harvey County simulcast tower NE of Burrton, and the Sedgwick County tower north of Wichita. It's just likely that you truly are in a dead spot between those towers.
Thanks for all the information.