Entries not flowing to Special GL Indicator inspite of Config settings

Hi,

I have made the required configuration settings in FBKP for Special GL Transactions.

Still, I found that In one of the document posted , the entries didnt flowed to Special GL ,neither it has flown to Customer Recon GL.But , The same value can be seen in The Customer Subledger(as seen in the FD10N).

The entry passed was like this :

29 Vendor (Debit)

15 Customer(Credit)

15H Customer Special GL(Credit)

Actually , the system should not accept the special GL Indicator H with Posting Key 15.

Can anyone put across their insights on this??

Thanks in advance.

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