Torp74,
Welcome to Satelliteguys.US.
The short answer to the question: Why can't I get San Antonio locals on Dish when I live in Loredo?
Because the The program producers, distributors, Networks, stations, Feferal Government (Congress Presidents [Clinton and Bush 2], the FCC as mandated by Congress and the Federal Court System) said NO!
Really. That's the answer.
Your loical stations have an exclusive (as into exclude all others) agreement with the network to serve a specific area. If you are in that area, the station has exclusive rights to your eye balls for the programming from that network.
Similar rules apply to the syndicated programming they air as well.
So that covers NBC and CBS which are served by KGNS TV 8 NBC/CW 15.2, KOFX 39 (FOX) and KVTV TV 13 CBS
The laws regarding this are very complicated since the have evolved over the last two decades splitting off the laws evolving for decades before that involving cable retransmission of distant channels. There are several threads about this if you do a search for "distant local" here on the forum.
See ya
Tony