Business Central MAU not being recognised AND Microsoft Support not really getting it

Microsoft support are currently "asking the product engineers what evidence I need to submit to prove that we have Business Central usage not being correctly accounted for"

What I have sent so far:

• An active subscriptions export from the partner portal
  • I picked one subscription GUID for 7 Business Central licenses as an example
  • It shows them as active and also renewed
• A "Cloud Product Performance - Business Applications" export from the partner portal
  • This shows the same subscription GUID
  • BUT the Business Central licenses are classified as Common Data Service workload and not Business Central
  • This report shows another subscription for identical licenses is classified as a Business Central workload

The problem:

• The rate used for common data service is much lower than the rate used for Business Central [1000] when calculating the values for partner performance.
• This impacts our ability to retain our solution partner designations

Questions:

• Anybody else suffering from Business Central licenses attributed to the wrong workload?
• Anybody got the faintest idea how to convince Microsoft support that the evidence has already been supplied if only they actually analysed it?
• Is there some obscure reason why a Business Central Essentials license would not be attributable to a rate of 1000?