Hi,
There is a sequence that SAP uses in determining the payment detail information to create the payment request and you cannot have the same account number defined in 'Setup creation of payment details' and communication data. I'm not sure what you have in Communication data but in the creation of payment requests node you are used ZPPCIHCC100 multiple times; SAP gets confused with this and chooses the first one. Attached I have a word document of the snapshots of how I configured it. Let me know if you have any questions on it.
Regards
-Anya