Myrtle Beach a month ago was the first time I had used cable with my new one as well. Same problem. Had to change the coax from one outlet to the other behind the tv, switch the tv to cable and do another channel search. Took me 2 days to figure this out. When I got home, I tried to use the satellite in the yard and nothing. Remembered to switch coax outlets and bingo, I had satellite. My 2011 wasn't hooked up this way, all I had to do was switch tv and do a channel search on it. My new one has 2 coax outlets behind the tv. And yes, both had two coax outlets outside too. One marked cable the other marked sat/aux.
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2013 F350 6.7L Lariat 4x4 CC DRW,Viair 1007, Ride-Rites, Edge CTS, B&W
2001 Chevy 3500CC DRW 4x4, 8.1L, 4.10 gears w/ Detroit TrueTrac
2001 Ford Excursion Limited 4x4 7.3L,V/B Spring Mod, ProComps, Hellwig Swaybar, & other 'Necessities'