how to not trigger a tom on a snare upstroke?

https://youtu.be/cUTubEuOXXk?t=204 (link is time-set to the corresponding part of the video)
This video on YouTube shows an Aerodrummer's screen while playing. Notice the tom above the snare, and how when he raises the stick to hit the snare he hovers over the tom, yet never seems to trigger a hit from that tom. On MY setup, though, I find that if I have a tom above the snare in a similar arrangement, I always trigger the tom on my snare upstroke.
What might be different in the setup in the video?
This video on YouTube shows an Aerodrummer's screen while playing. Notice the tom above the snare, and how when he raises the stick to hit the snare he hovers over the tom, yet never seems to trigger a hit from that tom. On MY setup, though, I find that if I have a tom above the snare in a similar arrangement, I always trigger the tom on my snare upstroke.
What might be different in the setup in the video?