Excellent detective work!
A few thoughts:
1) No need to screenshot the settings, unless that's how you like to work. If simply wanting to go back to all default settings, then a pinhole reset of the hub will achieve that. If you've got multiple settings adjusted for how you like, the hub has a backup to PC and restore settings function under the hub's Admin menu.
2) VM have "previous" for rolling out wifi settings changes that customers didn't ask for, and for hub firmware faults that cause occasional wifi settings changes like renaming the wifi bands. It's worth knowing that if wifi performance deteriorates suddenly that the settings may have changes, and you'll need to go in and check that for example both wifi bands are on, that they have the names you want, and the intelligent wifi hasn't re-enabled itself. Ultimately VM have total control of the hub, and that includes your wifi settings.
3) Don't forget that there's always the option of buying your own router or mesh system, and running the hub in modem mode. That normally provides better wifi than even a fully optimised hub, and VM can't mess up the settings either through unrequested "improvements" or through dodgy firmware. I haven't looked back since putting the hub in modem mode and connecting a mesh system, but I accept that many people believe that they should not have to buy their own wifi gear.
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