Assume I have 3 groups:

Group 1 = Properties A/B

Group 2 = Properties B/C

Group 3 = Properties A/B/C

If I run a corporate report, selecting only Group 3, the header of the report shows Group 1, Group 2, Group 3.

This is not correct. The header should only show Group 3 since that is the group I selected when running the report.