@jbeckmantx, using the word ON with the normal google action ( as opposed to the newer TRIGFERcmd Smart Home action) has often been a problem because the word ON is used as the delimiter between the trigger name and the computer name (calculator on downstairs). I've tried to train Google's AI to handle that but it's still an intermittent issue.
If you haven't tried the TRIGGERcmd Smart Home action, you really should. That's the best solution for thing you turn on and off.