SYMPTOM:
A graph report with attribute Year and Category in the row, metric Cost in the column as shown below:

Enable "Suppress last level labels" option as shown below:

Category is not suppressed. But if the graph report has attribute Year and Category in the column, metric Cost in the row, enable the "Suppress last level labels" option, then Category is suppressed as shown below:

CAUSE:
This is a known issue in Strategy Developer 9.x.
ACTION:
Strategy will continue to investigate and post updates as soon as they are available.