November 1st Xbox Insider Release Notes – Alpha Ring (1911.191030-1945)

This is fixed. See notes at ASA Alpha Insiders release notes and News.xbox

In my understanding the Dashboard experiment, A, B, C selection, is totally random.

As "Both consoles say their OS Version is (19h1_release_xbox_dev_1911.191028-1335)" your consoles are either in the Beta or Delta ring.

Both those rings and Omega ring are getting a preview update News release notes Beta Delta Omega
Insiders today, which you can manually start or wait until it becomes mandatory.

After you do the update, if you want to change rings, it will be the perfect time to change as all those rings will be on the same release. Subject to eligibility.

Hi,

you can change rings in the xbox insider hub when yo manage the xbox update preview rings note that alpha and alpha skip ahead are invite only but you should be able to join the beta ring

G'day,

This is a known issue being tracked by the developers.

Alpha Insider release notes XBox news

The current Xbox Insider Alpha release build is RS_XBOX_RELEASE_2007\19041.3432.200623-0000 (2007.200623-0000)

Source:
https://news.xbox.com/en-us/2020/06/24/xbox-insider-release-notes-alpha-2007-200623-0000/