Intune Data Warehouse Power BI Desktop Reports

Relative rookie to Power BI Desktop.  Took a basics course and have been playing around with Desktop, getting data from Intune Data Warehouse.  To start, I'm just trying to create a report of devices in the environment, based on OS.  I have a table showing the available OS's, with count of DeviceNames and also have cards for each OS showing individual numbers by OS and also a raw data table that should provide the device details for the OS selection.  What I'm finding, based on my filtering selections, is that the numbers provided are not the same as what I'm seeing in the Intune console (hundreds of devices off) and if I export the raw data table and show in Excel... the number of devices presented is not even the same as the report numbers.  Been trying to isolate the differences as well as, perhaps, find a field to include that might make the numbers match, but not having much luck.  

Is there anything in particular I should be looking at?