The tabs on the Recent Activity page show Today, Yesterday, This Week, This Month, etc.
The time windows that implement these tabs are simple blocks that go off the calendar Day/Week/Month. Since today is the 2nd of this month, when I click on the "This Month" tab, I get the activity from the last two days. This isn't what I expected to see.
I would expect this be rolling windows, based off the last 24 hours, 168 hours, etc.
Month is a little hairy, since months have variable length. This could be fudged by simply being 31 days). Also, users might be confused if Yesterday, Last Week, and Last Month used rolling windows.
Would it be less surprising, or more useful, to change the today/this week/this month tabs to be rolling windows?
This could be implemented by changing the existing tabs, adding rolling window tabs, or adding a user option to change the tabs to be rolling windows.