Bank statement posting to incorrect GL A/C

Hello

We have created the following customisation for electronic bank statement upload.

Bank symbols defined

1) GBBANK

2) GBBANK OUT

Posting rule defined

Rule posting Acct (debit) posting Acct (Credit)

AB01 GBBANKOUT 50 GBBANK

Accounts assigned to Symbols

1) GBBANK 111014

2) GBBANK OUT 112014

External transaction type is assigned to above posting rule. The interpretation algorithm is 019 and processing type is 05 .

Now when the bank statement is uploaded the credit is posted correctly to account 111014, but the debit gets posted to a different GL account 111061 which is not at all configured for EBS.

Please can anybody suggest what could be wrong

Thanks

Nelson