This is behaviour I've noticed this week. I've logged finds on gc.com and soon after my profile stats get updated. But I can only see the most up-to-date stats when I'm not logged into project-gc.com.
That is, if I go to https://project-gc.com/ProfileStats/bruzie while logged in, I see my old stats (2702 finds), but if I open that same link in a "private browsing/incognito mode" window (so that I'm not logged in), I see my updated stats (2710 finds).
I am a premium member, so I know my stats get updated once a day, but if my latest stats are available to anyone, then surely I should be able to see them while logged in?