Have done some further investigation. Some GA kits work properly. For example, Kitchen in the Electronic Art Music group works just as I would want it (If I wanted it!) with Instrument – I can play one drum with one pad. The one that I really want to use, however, is one of the expansion packs, the Simon Phillips Jazz drums. Perhaps the difference is between a synth sound and a sampled one? It seems that if a picture of a drum set is shown on the right side of the GA window, the Kit template doesn’t work properly. If it’s a waveform, mostly it works.
What would I have to do to make the Simon Phillips pack work? BTW, I’m using the Maschine Mikro Mk3, if that makes any difference.