Typically when entering source codes marketing effort information is populated but in this case users find that when there are multiple marketing efforts with the same source code that the effort information isn't populated.
We are currently evaluating this issue for future release.
Workaround: May need to select marketing effort.
Steps to Duplicate
1. Go to revenue and click add payment 2. Enter constituent name, amount, select the designation then click add. 3.Go to the Marketing tab. 4. Click the Source code search option. 5. Search without any filters, and locate a source code that is linked to multiple marketing efforts. 6. After selecting said source code notice that effort information is not populated.