I am looking through the "Creating Time Based Leaderboards" tutorial to try to understand how to use Running Totals.

1. Under step 2, we are supposed to create a new running total. "Day" is added as an Event Attribute with summary type "Maximum". Why is this?

2. Under step 3, the example does not use the Running Total created in step 2. Is this a mistake?

3. Under step 3, the filter value is shown as ${today:minus(30)} in the screenshot, but ${today:minusDays(30)} in the text. Which is correct?