I have been able to watch Sling remotely away from my home for years but recently my satellite TV control box powers off when I shut or log off Sling & I am not able to turn on Sling remotely because my Satellite reciver is off at home. Obviously I cannot watch Sling now when traveling.
Not sure I understand your problem. The fact the Sat TV box switches off shouldn't affect the Slingbox. All that should happen is when you connect through Slingplayer you get a "No Video": message, but the Sat box can then be switched on with the virtual remote.