Steps to reproduce:
1. Within the MUX go to roadmaps and create one roadmap
2. Add few road map items in the roadmap
3. Go to grid view and add any "Totals" attribute to the grid view, like total capacity.
4. Try to sort on capacity or cost column by clicking on header label
Grid sorted per selected column capacity or cost
No effect on sorting order of the grid.
Release : 15.9.1, 15.9.2, 15.9.3
This is a limitation of the design. It's not possible to sort by any Totals attribute.