Late to the party on this one but I made a discovery. When I was recording just one track, with the Focusrite set to stereo and me using input 2, I was not getting any data through the interface. Channel 1 was fine. After Sweetwater (They are the best. The BEST Jerry!) sent me a new unit, as I was testing I discovered that I need to change the prefs to left for channel 1 and right for channel 2. It's pretty embarrassing that a nerd at my level didn't think to check that, but I figured when the interface was set for stereo, either input should work. And it does if RealBand is set to record stereo tracks. When selecting MONO AUDIO as the track type, then the Focusrite makes a discrete split and you have to use input 1 for left and input 2 for right.

Feel free to flog. I should never have missed that troubleshooting step. A guy who was at a server level help desk for years.... DUH!!!