When using the queryoperator 'does not equal', on the First Gift > Appeal ID field, records with blank values are omitted from the results.
We have evaluated this issue as a bug and we have determined it will not be addressed in the program in its current state. In this case, we believe the risks and challenges outweigh the potential benefit of resolving this issue. We strive to select the most impactful changes and issues to address with each release to accelerate the rate at which we deliver new features while sustaining the highest level of quality for our customers. We would certainly recommend adding this program suggestion to our Ideas Community page. Our developers check here first when building program enhancements to see what our users are most interested in seeing implemented.
To get the results you need in your query, you can add a second line to the criteria to include the blank values: (First Gift Appeal ID does not equal Walk-A-Thon OR First Gift Appeal ID blank)
Steps to Duplicate
Add a new Constituent record and add several new cash gifts.
For the first cash gift leave the Appeal ID blank.
Create a Constituent query and set the criteria as First Gift Appeal ID does not equal 'Walk-A-Thon'.
Run the query and see the record added does not appear in the results.