The monthly totals displayed (Teaching, Other Revenue, Expenses, Net Revenue) on the "Expenses & Other Revenue" page are totally separate from the totals displayed on the "Families & Invoices" page. When the revenue forecast chart on the "Expenses & Other Revenue" page is set to "Accrual" mode, it calculates the forecast based on what billable lessons are scheduled on the calendar. When it's switched to "Cash" mode, it's showing all the payments you've received in each month.