Demonstration videos show a multitude of channels but I only show channel 3 and no others. Is this correct?

Yes it is OK, the videos show Spooky running in Test Mode, that's why they show 127 generators, which is the maximum Spooky can drive on a single computer. Since you only have a single XM in your setup, the Spooky program when not in Test Mode will show only the XM you actually have. IOW if you were running 5 generators, you would be seeing 5 right now.