Unpaid bill detail report doesn't show both memo lines

Hello, DGoodwin. 

Thank you for reaching out to the Community. When building a report, QuickBooks looks at individual transaction lines. If a line matches the report set, then the line is added to the report. 

QuickBooks Desktop also uses a concept called Source and Targets to apply accounting principles and processes, like recording transactions and displaying reports. Understanding Source and Targets help you maximize Report Filters so you can create more effective reports and faster-advanced finds.

• Source is the summary information about a transaction. It contains all source data (source account, source name, source memo and source amount, etc.).
• Targets provide the detailed information about the transaction and include all target data (target accounts, target names, target memos, target amounts, etc.). 

 As a workaround, we can export the report to excel and manually add the memo in the items.  

You can check out this article for more information about exporting report in QuickBooks Desktop: Export reports as Excel workbooks in QuickBooks Desktop. 

Additionally, you can also check out Understand reports to learn more about everything you can do with QuickBooks Desktop reports. This way, you'll be a pro before you know it when it comes to building a report.  

Feel free to let me know if you have further questions or concerns. You can always reach out to the Community or me anytime you need a helping hand. Take care!