Handling of CVD and BCD in NAV

Dear Experts,

My client imports goods and on his imports he pays CVD (countervailing duty) and BCD (basic custom duty) to the third party.
In order to handle the CVD I have created the excise posting setup and then created a CVD related structure along with that where I have put in the following values.
"CVD" = Yes
"CVD Payable to Third Party" = Yes
"CVD Third Party Code" = 225045 (The GL Account code for Third Party)

In NAV I was unable to locate any setup to capture the BCD value which should be posted to the third party (The third party here is same as the CVD third party mentioned above). So in order to handle the same I created a charge named BCD in the above mentioned structure and put in the following values for it:
"Payable to Third Party" = Yes
"Account No" = 320006 (GL Account code for the BCD charge)

In Purchase Order which use the above structure the user puts in the vendor code of the BCD related third party (I have created a vendor for the third party and tagged it to the GL Account code 225045 which is the common account code for CVD and BCD).

All the posting and calculation at the time of posting are happening fine. But the issue is that the GL Account code 225045 is showing correct figure including both CVD and BCD, but the ledger for the third party vendor is only showing the BCD charges as only BCD is posted using the vendor code. Thus the end user is getting confused when he seeing the vendor ledger.

Can anyone suggest me how to post CVD and BCD both either using same GL Account code or using same Vendor Code?