Oh yeah. This is a good one. Exemplifies the reason why I built the bot in the first place. So I'd have a reason to stumble onto more lore like this on an ongoing basis rather than depending on me randomly thinking "hey, I should look at Backrooms stuff".

It's interesting to me that with the default expression of this phenomenon, the higher-numbered levels feel "higher" in altitude than the lower-numbered levels and not the other way around. It feels a lot of other lore seems to hint that the Level 0 (the "Lobby" or "Threshold") is below The Frontrooms and other levels in increasing number are successively lower. For instance, in some of Kane's lore, there's one person who noclips through the floor in their garage and ends up in Level 0. But the page in the OP does specifically mention that some wanderers experience Numberation in the opposite direction, so that sounds like a nod to the fact that different fans of The Backrooms feel differently in their own head canons about the altitude of the levels.