I'm getting some unexpected results. With the default "Within 3 days" smart list, I wanted to edit it so that it doesn't show me recurring tasks. When I add that filter, so that the filters now read:
Scheduled (within 3 days)
Recurring AND (1) (Not recurring tasks only)
The list now only shows me tasks, not calendar events. Before I edited the filters, it did show calendar events. I'm not sure why adding this filter removed those events. Is this intentional? If so, how can remove recurring tasks without also removing calendar events?