Good question… I don’t think these things are completely determinate in the Sense world, where they use machine learning to sort out power signatures. My experience indicates that a lot depends on ordering of learning. I originally was seeing behaviors similar to you, where one AC unit (downstairs) showed up as a single device, but the upstairs was detected as AC plus a motor. It might have been because the compresser and the furnace blower were more widely separated in the house wiring, or something else. After doing a reset, I set my thermostat to turn on the furnace blower for 5 min every hour. Each hourly fan/blower was detected as a motor/fan. A little later, each of the ACs was detected. Dowstairs was detected as a combined compresser/blower. Upstairs was detected as a combined compressor/blower, plus a separate 5 sec motor spike at the start of every AC cycle, that I needed to merge for the full power.