VAT Tax Code Summary Uses the Company's Base Currency and not the Transaction Currency?

If your setting on Setup > Accounting > Set Up Taxes: Print Tax Code Summary on Sales Forms = T
Your VAT summary will always follow the base currency of your company.
For One World, it will follow the base currency of the Subsidiary
 
The functionality as implemented is in accordance with UK HMRC requirements for non-Pound Sterling transactions.

However, there are customers who find this confusing specially if their UK customers use another currency aside from their base currency. Enhancement 176359 was logged to address the request.