When trying to pull data in SA360 by dimension Week Starting Monday, it is sending an error of "External error calling data source API". When you try and pull this a different way it is assigning spend to the wrong days.
Now you should be able to use every temporal dimension.
On the other hand, we compared spend values with sa360 and the data was correct. If the data is still wrong, can you report the query to us using the feature placed in the add-on?