Why is my Insights report showing larger numbers or data than I have in Support?
Most often this is due to date filtering. When using date metrics if you only want data from the current time period, you will need to use "/Year" date filters, Month/Year or Week(Sun-Sat)/Year for example. Using Month or Week(Sun-Sat), for example, reports on all months for which you have data.
See Insights date dimensions for more information.