Is this a bug? In the 'largest bets' list a lot of the bets are by a "hidden" player, but in the "last 7 days" list I see the same bets with "Sadie" next to them. If Sadie wants to hide you should hide her name in both lists!
If a player changes his privacy settings, some tables don't reflect this change immediately. We don't generate 7-day summary every few minutes and I guess this is what happened: someone changed the privacy setting, the tables that are refreshed more often got the change, while it took longer on other tables. But I'll keep my eye on it!
It sounds like a reasonable explanation, but I don't think it's the correct one.
Looking at the all-time largest bets for LTC, I see Sadie's 47, 48, and 49 bets showing up as "hidden" (check my previous screenshot to see that they belong to Sadie), but in the biggest LTC bets of the last 7 days I see a bunch of 36.65 LTC bets by "Sadie(149603)" - ie. not hidden. So even though days have passed since my previous screenshot, some of Sadie's big bets are "hidden" and some are not.