When creating an attribute categories, you have an option to check or uncheck the available in lists" for the attribute. If this is not checked (available in lists = no). Users are still seeing this attribute in Research lists.
We're currently evaluating this issue for a fix in a future release.
Steps to Duplicate
1. Navigate to Administration > Attribute Categories 2. Under the Attribute Categories tab add a new attribute category. 3. Enter a name for the attribute category 4. Select the Record Type drop down and select "Constituent" 5. DO NOT CHECK the "Make availibale in lists" check box 6. Click Save 7. Navigate to Prospects > Manage research lists 8. Add a new "Research List" 9. Click the + Biographical tab under "What is the criteria for creating your list?" section. 10. Select the drop down for "Search criteria to use under biographical" 11. Note that the attribute which was not marked to make available in lists is showing as an option in the drop down.