On the Gantt chart view page (as well as reports/dashboards that show Gantt charts) it is not showing the indentation correctly if a summary task rolls-up into another summary task. As I understand it, this is because PPO is not actually aware of how tasks roll-up into other tasks - it only understands the difference between summary and normal tasks.
Please consider building functionality into PPO so that it understands this relationship and indents tasks correctly on all Gantt charts.