This is what I was told was the problem from a highlevel CRM support specialist. Please fix this asap or else the Dashboard is completely useless as it does not provide accurate data

Our development team stated that the opportunities on the location dashboard stats are filtered using the filter "last status change date", while the opportunities on the opportunity tab are filtered using the "created on" filter. So when you go to verify that data on the dashboard, you won't have the proper filter available to you to verify that on the opportunities tab. The "last status change date" filter is not available in the opportunity tab, this is why they don't match.