This issue exists for ALL settings you make in commands center as far as I can tell. Not just the HX Snapshot setting. For instance, I have a Boss RC-5 looper pedal. It's a one-stomp looper, and I don't like having to double tap it to stop a loop, or hold it down for two seconds to clear a loop (which clears it only after starting to play the loop for 2 seconds), so in command center, I assign a 'stop/start' scribble strip label to a stomp under the 'CC' command center option and configure a MIDI command to be sent to the pedal to stop/start it. This let's me stop a loop from the helix without having to double tap it. I do the same for clearing a loop. I can send a MIDI command to clear it, and bingo no 2 second playback before clearing the loop.
The problem is, if the preset has multiple snapshot, I have to do this for each snapshot. If I don't then the 'Stop/Start' scribble strip only appear under snapshot 1, and the midi command is only configured under snapshot 1. It would be nice to have a checkbox in command center that says something like 'Apply this settings to all current snapshots'. So if I have 4 snapshots, and i set up stompswitch 5 to be my 'Stop/Start Loop', I could just click that checkbox and now that is also applied to the other 3 snapshots. That or an option where you could select which other snapshots to also apply this setting to.
I actually did submit this to ideascale about a year ago, but I think I didn't describe the issue well enough and no one upvoted it. I thought at first maybe I was the only one that this 'quirk' drove nuts, but I'll give it another go, now that I see it bothers others as well.