I have 201 merit earned from the past 120 days, but the second list only shows I earned 130.
I don't have the answer to your question, but congrats on earning that many merits in that short of a time period. That's way better than the average bitcointalk member, probably better than some of the best posters, too. Props to you.
It's 30 days, probably up to the second accurate.
Yeah, I remember that list being quite accurate. Back in the early days of the merit system when I cared about earning them more I used to check the list as if I were in competition with other members. Glad my mindset changed as far as that's concerned, because list-checking can become an extremely obsessive activity.