In 15.9.3 the column limit to add to Status - Changes portlet is only 6 columns. In the report itself within the Changes widget, it’s only displaying 3 columns. No additional columns display.
Release : 15.9.3, 16.0, 16.0.1
Component : Clarity Project Management
1. Go to a Project - Status
2. Click on the Gear icon for Changes - then expand columns
3. Add the required columns. Note there is an OOTB limit of 10 columns added to the view