Hi
If you are on new GL with Document Splitting, check the category which has been assigned to the GL Account. The category defines how profit is derived in case of Document Splitting. The path for the same is:
IMG>Financial Accounting (new)> General Ledger Accounting (New)> Business Transactions>Document Splitting>Classify GL Accounts for Document Splitting.
Depending on the GL Account where dummy profit center is derived, check up your set up of splitting.
In addition check the document type used for booking the transaction. Make sure that the document type used is assigned to the correct Transaction variant. The path for the same is as under:
IMG>Financial Accounting (new)> General Ledger Accounting (New)> Business Transactions>Document Splitting>Classify Document Types for Document Splitting.
Based on the above two configurations, the profit center gets derived. Also as suggested earlier, check your assignments as well like material master, cost center, WBS Element or Internal Order from which profit center is getting derived.
Thanks & Regards
Sanil Bhandari