One of the changes in last night's update was to the graph that appears in the Overview section of the Basic and Professional Suites. There have been many questions regarding the graph and it was decided that the information it displayed was simply not intuitive enough. The graph now displays two columns that are labeled Sales and Income. The Sales column is calculated by summing the totals of all of your invoices from the first of the month until now. The Income column is calculated by summing the total payments received on Invoices from the first of the month until now.
If you have any questions about the changes to the graph, please let us know through the Feedback section of any of the StudioCloud products.