PowerPlay Total Thermal Power Dissipation vs. Thermal Power Dissipation by Hierarchy

I'm trying to wrap my head around the output of a basic PowerPlay analysis, and hope someone out there can clarify these results for me.

I've configured PowerPlay to use a 100% toggle rate for input I/O signals (trying to get an estimate of the absolute worst-case power usage) and to use vectorless estimation for remaining signals.

After running the PowerPlay analysis, the "Summary" menu contains:

Total Thermal Power Dissipation: 906.82 mW

Core Dynamic Thermal Power Dissipation: 180.22 mW

Core Static Thermal Power Dissipation: 682.94 mW

I/O Thermal Power Dissipation: 43.65 mW

However, when I go to the "Thermal Power Dissipation by Hierarchy" menu, I see total thermal powers like:

<top-level entity> 198.79 mW

'- ... 29.02 mW

'- ... 0.00 mW

'- ... 0.00 mW

'- ... 23.50 mW

'- ... 12.65 mW

'- ... 111.57 mW

So, why does the total thermal power of the top-level entity not match the 906.82 mW total thermal power dissipation (or any of the other power dissipations) from the summary menu?

Thanks in advance.