Conditions for the issue:

1. In User Setup, add a Purchase Responsibility Center Filter to a user (as an example, 'Academic').
2. Process two Posted Purchase Invoices, one with the 'Academic' Responsibility Center and one with a different one, 'Operation', for the same Vendor.
3. When the 'Academic' User goes to the Posted Purchase Invoices page, they only see the Academic invoice.
4. When the same user goes to the Vendor Ledger Entries page, they see both invoices. If they try to open the Document for the 'Operation' invoice from that page, they instead see the document for the next PPINV that has the 'Academic' responsibility center.

What should happen is that they should get an error message, saying that they don't have permission to view that document.