Are you saying your RSN carried the second game and even Direct isn't carrying it?
Did you read what I said about the rules for teams that routinely start late? Astro's may for same reason Rangers do....
Astros have a retractable roof on their stadium. They chose to start at 6:05 so they could be out of range of the Fox blackout, not because of the heat.
The RSN was not carrying the rained out game. Friday games for the Rangers are carried on TXA21, and Dish puts the game on the alternate channel. Likewise, the rescheduled game is still on TXA21 even though it is on a Saturday. Fox Sports Southwest is carrying the Bulls/Mavs game. All other channels are either off-air or showing a game that is out of the region or the Astros game.
From what I've read, and the site could had been wrong, but it said that if the Fox game started at 3:05, other games that started between 12:10 and 6:05 could not be broadcasted on different channels. The first game started at 12:05 and the second game started at 6:05. Fox Sports Southwest shown the game that started at 12:05. Oddly enough, an alternate channel was also showing the game and that never happens.
I could not find anything regarding Fox blackout restricting a team to having one game on Saturdays. Regardless, both games were outside of the blackout period.
My best guess on what happened is that Dish assumed that the first game was the game that was not going to be on the Fox Sports Southwest and they placed it on an alternate channel. In reality they needed to put the late game on an alternate channel as it was on TXA21 and just let Fox Sports Southwest broadcast it as they would had normally.