Trying to rule out items that may be causing instability in my Hopper (I had two hard lookups within 12 hours yesterday), I've unplugged both the ethernet and the Sling Adaptor. It's been stable (*knock on wood*) since last evening, almost 24 hours. If it remains stable, I'll replug in the ethernet tomorrow morning.
But without the ethernet, setting recordings via the Dish app on the iPhone/iPad is faulty. Twice when I attempted to record a show currently airing on a local network, it started recording channel 5819, a sports alternative channel. Setting a recording in the future also appears to set up incorrectly. It appears to not map the correct channel to the recording, only showing "WCCO" on the channel description, not "004-00 WCCO". Setting up a recording on a higher channel (say, TV Land) set up correctly. I don't know if this is directly connected to not having the ethernet plugged in.