There are data inconsistency on the dashboard.
On the Traffic analytics, The number of client used Youtube was 4 with usage 435.9 MB

But on the Rule details: Applications - YouTube, It has 7 clients with usage of 599.3 MB.
So I tried to get data directly through API
getNetworkClientsApplicationUsage
, now the usage is 613.852 MB with 7 clients.
Why this is happening, how can I fix or which one is the most reliable real-time data?