Area permissions inheritance from wrong page.

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Good Afternoon,

I have an extensive enterprise website with 60+ editors using C5. Recently I have noticed that new pages are not inheriting their area permissions from the correct page. Here is an example:

Home (Page Default Permissions)
|
+-- Departments (Manual Permissions)
|
+--Billing (Manual Permissions)
| |
| +--AR (By Area of Site)
|
+--HR (Manual Permissions)
|
+--Payroll (By Area of Site)

Scenario:
Page AR should inherit the page permissions and the area permissions from Billing page. But instead it is inheriting the page permissions from Billing and area permissions from Departments. Same with Payroll page which should be inheriting it's area permissions from HR page.

In my frustration I may be over looking something obvious. I don't know. Does anyone have any ideas?

Thanks,
J